Biology 401-450 MCQs

Biology

401. In esterification OH comes from ________ ?

a. Organic acid

b. Alcohol

c. Water

d. Sugar

402. How many carbon atoms are required to form a furan ring (ribofuranose) _______ ?

a. 3

b. 4

c. 5

d. 2

403. Sleep movements are a type of ________ ?

a. Turgor movements

b. Growth movements

c. Tactic movements

d. Paratonic movements

404. Keto group is represented as _______ ?

a. CO

b. C-COO-C

c. HCOH

d. HOH

405. The type of learning in which there is loss or decrease in response to repeated stimuli?

a. Imprinting

b. Habituation

c. Latent learning

d. Insight learning

406. Glycolipids and glycoproteins have structural role in the _______ matrix of animal and bacterial cell?

a. Extracellular

b. Intracellular

c. Both of these

d. Glucose

407. The cells present in testes and secrete testosterone are ________ ?

a. Sertoli cells

b. Germinal cell

c. Interstitial cells

d. Spermatocyte

408. In Cx(H2O)y x ranges from _________ ?

a. 1 to 3 thousand

b. 3 to many thousand

c. 3 to 5 thousand

d. 5 to 9 thousand

409. Exposure to low temperature stimulates plants to flower. This is called ________ ?

a. Photoperiodism

b. Thermotropism

c. Vernalisation

d. Thermoregulation

410. The basic structural unit of a chromosome is ________ ?

a. The centromere

b. Nucleosome

c. Telomere

d. Histone

411. In living organisms the lubricant which provides protection against damage resulting from friction is _______ ?

a. Carbohydrates

b. Fatty acid

c. Water

d. Protein

412. The first stage of development in which a cavity appears is the _______ ?

a. Neurula

b. Morula

c. Gastrula

d. Blastula

413. The trioses which are intermediate in respiration and photosynthesis are ________ ?

a. Glyceraldehydes

b. Dihydroxy acetone

c. Both of these

d. None of these

414. The monosaccharide found in some bacteria and occurring rarely are ________ ?

a. Trioses

b. Hexoses

c. Tetroses

d. Pentoses

415. The one which causes contraction of wall of the uterus during and after birth?

a. ADH

b. MSH

c. Oxytocin

d. Progesterone

416. Which statement correctly describes the transcription of DNA?

a. It produces another DNA molecule

b. It produces mRNA

c. It is a semi conservation process

d. It occurs at surface of ribosomes

417. Triglyceride is also known as _______ ?

a. Natural lipid

b. Neutral lipid

c. Neutral wax

d. All of these

418. Carbon commonly combines with ______ ?

a. H

b. N & O

c. P & S

d. All of these

419. The sequence of 3 bases on tRNA which is complementary to codon of mRNA is called _______ ?

a. Gene

b. Anticodon

c. Code

d. Codon

420. The survival of an animal depends upon its ability to take some from its environment _______ ?

a. Chemicals

b. Hydrocarbons

c. Organic molecules

d. Inorganic molecules

421. In humans the number of tetrads formed during mitosis is _______ ?

a. 23

b. 46

c. 0

d. 4

422. Non polar organic molecules are ________ in water?

a. Soluble

b. Insoluble

c. Partially soluble

d. Depends upon condition

423. Interconversion of carbohydrates proteins and lipids in living cells are an example of _______ ?

a. Coordinated catabolic activities

b. Coordinated anabolic activities

c. Both A and B

d. Any one

424. Which one of the following is correct sequence of stages of prophase 1 of meiosis.

a. Diakinesis diplotene pachytene leptotene zygotene

b. Zygotene leptotene pachytene diplotene diakinesis

c. Leptotene zygotene pachytene diplotene diakinesis

d. Pachytene leptotene diplotene zygotene diakinesis

425. Which one of the following syndrome is the result of meiotic non dysjunction?

a. Klinefelter's syndrome

b. Turners syndrome

c. Downs syndrome

d. All of these

426. Which one of the following stage precedes mitosis during cycle?

a. G1 phase

b. S phase

c. G2 phase

d. M phase

427. Most of the cellular secretions are _______ in nature?

a. Glycolipids

b. Glycoproteins

c. Nucleohistones

d. Proteins

428. Genes will not be found in gene pairs in the _______ ?

a. Muscle cell of worm

b. Uterine cells of dog

c. Sperm cells of frog

d. Guard cells of leaf

429. rRNA constitutes _______ % of the total cellular RNA?

a. 3-4 %

b. 10-20 %

c. 80 %

d. 90 %

430. A genome is _______ ?

a. Appearance of an individual

b. Genetic basis of few characters

c. Full set of genes of an individual

d. All of these

431. Which conjugated molecules play important role in gene expression _______ ?

a. Glycolipids

b. Glycoproteins

c. Nucleohistones

d. None of these

432. There are mainly ________ types of tRNA?

a. 170

b. 20

c. 25

d. 15

433. The disease in which transmembrane carrier for the chloride ion is not produced is ________ ?

a. Hyper chloesterolemia

b. Cystic fibrosis

c. Severe combined immunodeficiency syndrome

d. AIDS

434. The one which is a weed killer is _______ ?

a. IAA

b. NAA

c. 2 4-D

d. GA

435. Five kingdom classification was proposed by _______ ?

a. Carolus Linnaeus

b. E-Chatton

c. Robert Whittaker

d. Lynn Margulis and Karlene Schwartz

436. Organisms of which of the following kingdom have absorptive mode of nutrition _______ ?

a. Prokaryotae

b. Protoctista

c. Animalia

d. Fungi

437. Which of the Euglenas (a Protoctista) character resembles that of animals _______ ?

a. They can move

b. They lack cell wall

c. They do not have chlorophyll

d. Both a and b

438. The one which can break open a plasmid ring is ________ ?

a. Ligase enzyme

b. Primase enzyme

c. Restriction endonuclease

d. ATP-ase enzyme

439. Allium cepa is the scientific name of ______ ?

a. Onion

b. Amaltas

c. Potato

d. Tomato

440. According to Lamarck evolution occurred as the result of ________ ?

a. Natural selection

b. The theory of recapitulation

c. Inheritance of acquired characters

d. Over production

441. Which of the following category is most general with its members lest resembling with each other than the other categories ________ ?

a. Species

b. Genus

c. Family

d. Order

442. The first eukaryotes appeared about ________ years ago?

a. 1.5 billion

b. 2.5 billion

c. 3.5 billion

d. 4.5 billion

443. Those organisms which can prepare their own food from simple inorganic material and can store energy are called ________ ?

a. Autotrophs

b. Heterotrophs

c. Procariotique

d. Eu-cariotique

444. Solanum tuberosum is a scientific name of ________ ?

a. Onion

b. Amaltas

c. Potato

d. Tomato

445. The structure which has been formed or modified from gill pouches in humans is ________ ?

a. Gills

b. Eustachian tube

c. Middle ear

d. Lungs

446. Scurvy and beriberi and caused by the deficiency of ________ ?

a. Vitamin B and C

b. Vitamin B and D

c. Vitamin C and B

d. Vitamin A and B

447. The word which E-Chatton suggested for bacteria and blue green algae was _______ ?

a. Autotrophs

b. Heterotrophs

c. Pro-cariotique

d. Eu-cariotique

448. The greatest diversity of animals in the lake is found in which one of the following zones?

a. Limnetic zone

b. Littoral zone

c. Profundal zone

d. None of these

449. So far over ________ number of species of animals are known?

a. 3 million

b. 1 million

c. 1

d. 2 million

450. What is the characteristic feature of consumers?

a. Autotroph

b. Heterotroph

c. Parasite

d. Saprophyte

Exercises on Use of Correct Form of Verb (Ex. No. 7)

Exercise No. 7

i. What (you) _______ at four?

a. does you do

b. do you do

c. have done

d. will you be doing

ii. They _______ all night.

a. will travel

b. travel

c. travels

d. travelling

iii. I ________ for you at the usual time.

a. shall wait

b. wait

c. had waited

d. waits

iv. She ________ her lesson in French in the morning.

a. will be doing

b. has done

c. do

d. does

v. She _______ her work before the guests arrive.

a. will have done

b. did

c. does

d. can do

vi. They _______ their exercise by the time the teacher arrives.

a. will write

b. write

c. will have written

d. writes

vii. She _______ from tour of Europe by the middle of December next.

a. returns

b. returned

c. will have returned

d. may return

viii. The farmers ________ the harvest before it rains.

a. reap

b. reaped

c. will have reaped

d. reaps

ix. These mangoes _______ the market by April.

a. will have reached

b. will reach

c. reach

d. reached

x. I _______ all the novels of Golding by the end of summer vacation.

a. may read

b. reads

c. shall have read

d. read

xi. The meeting _______ by the time we gather.

a. will have ended

b. ended

c. ends

d. end

xii. I hope it ______ raining by the evening.

a. stopped

b. stop

c. will have stopped

d. stops

xiii. She _______ her examination by the next fall.

a. will have taken

b. took

c. takes

d. take

xiv. They _______ their work by tomorrow.

a. completed

b. will complete

c. will have completed

d. complete

Biology 351-400 MCQs

Biology

351. Pic the odd one out

a. Psilophyton

b. Rhynia

c. Cooksonia

d. Psilotum

352. Which of the following statement is incorrect for fats containing unsaturated fatty acid _______ ?

a. They contain double bond

b. They are usually solid at room temperature

c. They are lighter than water

d. Their specific gravity is less than 1

353. Which one of the following fatty acid is more soluble in an organic solvent and has higher melting point _______ ?

a. Acetic acid

b. Butyric acid

c. Palmitic acid

d. All have same

354. Peptide bond is _______ ?

a. C-N link

b. C-O link

c. N-H link

d. C-H link

355. Animals obtain carbohydrates mainly from ________ ?

a. Glucose

b. Starch

c. Sucrose

d. Glycogen

356. The one which is incorrect pair?

a. Sori - Indusium

b. Arthrophytes - Jointed

c. Dichotomous - Vernation

d. Lycopods - Ground pries

357. Double fertilization occurs in ________ ?

a. All plants

b. All seed plants

c. Gymnosperms

d. Angiosperms

358. Proteins comprise of ________ % of the total dry weight of a cell?

a. 40%

b. 50%

c. 60%

d. 70%

359. Adult birds normally possess only one functional _______ ?

a. Ureter

b. Ovary

c. Lungs

d. Testis

360. Chemically component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbohydrates (iii) proteins (iv) DNA _________ ?

a. i & ii

b. iii & iv

c. i ii iii & iv

d. iv only

361. Following possess bilateral symmetry as larva and radial symmetry as adult:

a. Chordata

b. Hydra

c. Echinodermata

d. Hemichordata

362. Proteins are polymers of ________ ?

a. Fatty acids

b. Isoprenoid units

c. Amino acids

d. Nucleotides

363. Which of the following is the empirical formula of chlorophyll b?

a. C55H70O5N4Mg

b. C55H72O6N4Mg

c. C55H70O6N4Mg

d. C55H72O5N4Mg

364. In Glycin an amino acid R group is replaced by _______ ?

a. H

b. CH3

c. COOH

d. C = O

365. How many moles of carbon dioxide are produced by complete oxidation of one mole of pyruvic acid?

a. 1

b. 2

c. 3

d. 6

366. The element in basic structure of proteins which differentiate them from carbohydrates _______ ?

a. C

b. S

c. H

d. N

367. Hunger pangs usually begin _______ after the previous meal.

a. 2-4 hours

b. 6-8 hours

c. 10-12 hours

d. 12-24 hours

368. Total number of amino acids discovered so far in cells and tissues are ________ ?

a. 20

b. 25

c. 150

d. 170

369. The major constituent of blood plasma is _______ ?

a. Protein

b. NaCl

c. Water

d. Cholesterol

370. An insulin molecule consists of ________ polypeptide chains?

a. 1

b. 2

c. 3

d. 4

371. The windpipe or trachea lies?

a. Dorsal to oesophagus

b. Ventral to oesophagus

c. Lateral to oesophagus

d. None of these

372. A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called _______ ?

a. Phosphodiester linkage

b. Glycosidic bond

c. Peptide bond

d. Hydrogen bond

373. Total number of amino acids in a hemoglobin molecule are ________ ?

a. 554

b. 564

c. 574

d. 584

374. Which structure of protein gives information about number and sequence of amino acids in it ________ ?

a. Primary structure

b. Secondary structure

c. Tertiary structure

d. Quaternary structure

375. Locomotory structures are not found in which of the following group?

a. Amoebas

b. Zooflagellates

c. Ciliates

d. Apicomplexans

376. Hemoglobin molecule exhibits which structural organization of proteins ________ ?

a. Primary structure

b. Secondary structure

c. Tertiary structure

d. Quaternary structure

377. In an aqueous environment the most stable tertiary conformation is that in which _______ amino acids are buried inside the conformation?

a. Hydrophobic

b. Hydrophilic

c. Basic

d. None of these

378. Which of the following statement is incorrect about RNA ________ ?

a. The pentose sugar in it is Ribose

b. It contains Adenine Guanine Thymine and Cytosine

c. It is present in the nucleoli

d. It may be folded back on itself to give double helical characteristics

379. Protein coats of viruses are synthesized in ________ ?

a. Lytic cycle

b. Lysogenic cycle

c. Both a & b

d. All of these

380. Each turn of DNA contain _______ nitrogenous base pairs?

a. 5

b. 10

c. 20

d. 25

381. Membranes of the grane are sites where?

a. Oxygen is stored

b. Food is stored

c. Sunlight is trapped

d. CO2 is stored

382. Antibodies play important role against microorganisms and other pathogens to which type of proteins do they belong ________ ?

a. Globular proteins

b. Fibrous proteins

c. Both a and b

d. None of these

383. The simplest of oxygen producing photosynthetic organisms are ________ ?

a. Algae

b. Bacteria

c. Cyanobacteria

d. Chlamydomonas

384. Amphioxus is a ________ ?

a. Chordate

b. Protochordate

c. Lower chordate

d. All of these

385. Which structural organization is most common in globular proteins _______ ?

a. Primary

b. Secondary

c. Tertiary

d. Quaternary

386. Which of the following does not show quaternary structure ________ ?

a. Haemoglobin

b. Pepsin

c. Fibrin

d. Insulin

387. Which of the following occurs in anaerobic respiration but not in aerobic respiration?

a. Release of CO2

b. Reduction of NAD

c. Formation of ATP

d. Production of ethanol from acetaldehyde

388. Helical structure is kept by the formation of ________ bonds among amino acids molecules?

a. H bonds

b. Disulfide bond

c. Ionic bond

d. Hydrophobic bonds

389. Which of the following are triploblastic and acoelomate?

a. Sponges

b. Annelida

c. Platyhelminthes

d. Aves

390. The food of hydra consists of ________ ?

a. Humus

b. Detritus

c. Dead microscopic animals

d. Small crustaceans

391. Actin and myosin are the basic proteins involved in contractile machinery of our body to which type of proteins do they belong ________ ?

a. Globular proteins

b. Fibrous proteins

c. Both a and b

d. None of these

392. If a plasmolysed plant cell is placed in water the cell will _______ ?

a. Burst

b. Be killed

c. Be deplasmolysed

d. Show no change in it

393. ATP is an important molecule for its major function _______ ?

a. As an energy currency of the cell

b. As a coenzyme

c. Both a and b

d. None of these

394. The first organism of whose genome was completely discovered was ________ ?

a. Human beings

b. Influenza Virus

c. Haemophilus Influenzae

d. None of these

395. All of the following veins carry deoxygenated blood except ?

a. Superior vena cava

b. Inferior vena cava

c. Hepatic vein

d. Pulmonary vein

396. Animals fats are _________ at room temperature?

a. Liquids

b. Gases

c. Solids

d. None of these

397. Sebum produced from sebaceous glands in a mammal helps in ________ ?

a. Protection against micro organisms

b. Temperature regulation

c. Excretion

d. All of these

398. Which one is not found in fatty acids in acylglycerols _______ ?

a. C-6

b. C-25

c. C-26

d. C-30

399. The one that stores calcium is _______ ?

a. Sarcolemma

b. Sarcoplasm

c. Sarcoplasmic reticulum

d. Cytosol

400. Which one of the following is most likely to occur in an animal during winter?

a. Activation of sweat glands

b. Dilation of skin blood vessels

c. Panting

d. Thermogenesis

Biology 301-350 MCQs

Biology

301. Which of the following statement is incorrect about Glyoxisomes?

a. They contain enzymes which help in conversion of fatty acids into carbohydrate

b. They are abundant in soybeans but absent in pea

c. They are present through out life of a plant and provide them with energy through Glyoxylate cycle

d. They are single membranous organelles

302. Ribosomes + m-RNA?

a. Polysome

b. Phlosome

c. Polosome

d. None of these

303. Which of the following impart a red colour to Rose petals?

a. Chloroplast

b. Chlorophyll

c. Chromoplast

d. Leucoplast

304. During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparatus are called _______?

a. Lysosomes

b. Primary lysosomes

c. Secondary lysosomes

d. food vacuole

305. The bond formed when two or more atoms complete their electron shells by sharing electrons is called _______ ?

a. Ionic bond

b. Hydrogen bond

c. Covalent bond

d. Electrovalent bond

306. Which one is the basic element of organic compounds ________ ?

a. Oxygen

b. Hydrogen

c. Sulphur

d. Carbon

307. Reactions in which simple substances are combined to form complex substances are called _______ ?

a. Metabolic reactions

b. Catabolic reactions

c. Anabolic reactions

d. None of these

308. Which chemical component has the same % in bacterial as well as the mammalian cell _______ ?

a. Water

b. Carbohydrate

c. Proteins

d. Lipids

309. The branch of biology which deals with the study of chemical compounds and the chemical processes in the living organisms is called _______ ?

a. Chemistry

b. Biochemistry

c. Molecular biology

d. Both a and b

310. Which chemical component has  the greatest contribution in the total mammalian cell weight _______ ?

a. Proteins

b. Carbohydrate

c. Lipids

d. Water

311. Which one is an organic compound _______ ?

a. CO2

b. Water

c. Lipids

d. HCl

312. Carbon atom is ________ ?

a. Monovalent

b. Divalent

c. Trivalent

d. Tetravalent

313. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is _______ ?

a. High specific heat of vaporization

b. High specific heat capacity

c. Its Dipole nature

d. Its liquid state

314. The number of calories required to raise the temperature of 1g of water from 15 to 16 degree is called _______ ?

a. Specific heat of vaporization

b. Specific heat capacity

c. Caloric Heat

d. Both A and C

315. The one which is present in all living things is ________ ?

a. Cell nucleus

b. DNA or RNA

c. Cell membrane

d. Vacuole

316. The mechanism of stomatal movement is related to the branch of Biology called ________ ?

a. Taxonomy

b. Physiology

c. Morphology

d. Anatomy

317. Which of the following substance is most favorable to form structural component of biological membranes ________ ?

a. Hydrophilic Carbohydrates

b. Hydrophobic fats

c. Both a and b

d. None of these

318. Maximum number of species of living thing on earth are _______ ?

a. Algae

b. Fungi

c. Insects

d. Protozoa

319. Which statement is true about an aqueous medium _______ ?

a. Ionic as well as non ionic substance in aqueous media retains their identity

b. Enzymes can not perform catalysis reaction in this medium

c. Icons and molecules move randomly thus are in more favorable state to react with other molecules and ions

d. It is less favorable media for chemical reactions

320. Which of the following carbohydrate is tasteless ________ ?

a. Monosaccharide

b. Oligosaccharide

c. Polysaccharide

d. None of these

321. Which of the statement is not true for compounds like glycoprotein and glycolipids _______ ?

a. They are conjugated molecules of carbohydrates

b. Both have role in the extra cellular matrix of animals and bacterial cell wall

c. They are components of biological membranes

d. Both are produced and secreted by endoplasmic reticulum

322. A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called ________ ?

a. Lipid

b. Carbohydrate

c. Protein

d. Carotene

323. Specific heat of vaporization of water is ________ ?

a. 574 Kcal/kg

b. 674 Kcal/kg

c. 774 Kcal/kg

d. 874 Kcal/kg

324. Cn(H2O)n. is a general formula of ________ ?

a. Monosaccharides

b. Oligosaccharides

c. Polysaccharides

d. Carbohydrates

325. Which one is the most complex sugar _______ ?

a. Monosaccharides

b. Oligosaccharides

c. Polysaccharides

d. None of these

326. Variety among amino acids is produced due to ________ ?

a. NH2 group

b. COOH group

c. R group

d. All of these

327. Primary structure of proteins determines ________ ?

a. Number of polypeptide chains involved

b. Bending of polypeptide chains

c. Amino acid sequence

d. Coiling of polypeptide chains

328. Ribose is an example of ________ ?

a. Trioses

b. Tetroses

c. Pentose

d. Hexose

329. The one which is not a globular protein ________ ?

a. Anti Rh-antibody

b. Enzyme

c. Myosin

d. Hemoglobin

330. Starch cellulose and glycan yield ________ on complete hydrolysis?

a. Maltose

b. Sucrose

c. Fructose

d. Glucose

331. ________ % of Glucose normally present in our blood is ?

a. 0.80%

b. 0.08%

c. 1.80%

d. 8%

332. Which of the following carbohydrate can not be hydrolyzed _______ ?

a. Monosaccharide

b. Oligosaccharide

c. Polysaccharide

d. None of these

333. An enzyme which converts a dipeptide into separate amino acids is an example of _______ ?

a. Decarboxylase

b. Hydrolase

c. Oxidoreductase

d. Transferase

334. Which one is soluble in hot water _______ ?

a. Starch

b. Glycogen

c. Amylose

d. Amylopectin

335. For the synthesis of 10g of glucose ________ of energy is required?

a. 717.6 Kcal

b. 727 Kcal

c. 737 Kcal

d. 747 Kcal

336. Cellular digestion is associated with which organelle ________ ?

a. Mitochondria

b. Golgi bodies

c. Plastids

d. Lysosomes

337. The covalent bond between two monosaccharide subunits is called _______ ?

a. Phosphodiester bond

b. Peptide bond

c. Glycosidic bond

d. Ionic bond

338. The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called _______ ?

a. Diffusion

b. Osmosis

c. Phagocytosis

d. Plasmolysis

339. Which of the following polysaccharide is called animal starch _______ ?

a. Starch

b. Glycogen

c. Cellulose

d. None of these

340. Which one gives blue colour with iodine _______ ?

a. Starch

b. Glycogen

c. Cellulose

d. Polysaccharide

341. Mycoplasmas have been included in bacteria because:

a. Do not have a cell wall

b. Are heterotrophic

c. Lack membrane bounded organelles

d. Reproduce by binary fission

342. Which one is abundant in animals ________ ?

a. Starch

b. Glycogen

c. Cellulose

d. None of these

343. The one which can tolerate highest external osmotic pressure is ________ ?

a. Algae

b. Amoeba

c. Fungi

d. Bacteria

344. The cell wall of oomycetes is chiefly composed of _________ ?

a. Chitin

b. Cellulose

c. Lignin

d. Proteins

345. ________ is example of pure form of cellulose?

a. Silk

b. Wool

c. Cotton

d. Paper

346. A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called ________ ?

a. Monosaccharide

b. Fatty acid

c. Neutral lipid

d. Nucleic acid

347. Lipids are soluble in which of the following ________ ?

a. Water

b. Ether

c. All solvents

d. Not in any of the above

348. One called green protists are included in _______ ?

a. Monera

b. Algae

c. Slime molds

d. Plants

349. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of ________ ?

a. C-C bonds

b. C-H bonds

c. C-N bonds

d. C-O bonds

350. Fatty acids containing 18 C atoms and a single double bond is _______ ?

a. Saturated Fatty acid

b. Unsaturated Fatty acid

c. Oleic Acid

d. Palmitic acid