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