Deck 14 (261 -280)

Question 1

261. The building stones of a polypeptide chain are:

a. ribonucleotides
b. amino acids
c. deoxyribonucleotides
d. vitamins

Answer 1

amino acids

Question 2

262. Assuming all other factors to be the same, electron microscopes have greater resolving power than light microscopes because …

Answer 2

because the wavelengths in visible light are longer than with electrons

Question 3

263. In human urine the following is/are concentrated:

a. proteins
b. blood cells
c. glucose
d. uric acid

Answer 3

d. uric acid

Question 4

264. The product of plant cell protoplast is/are the ?

Answer 4

cell wall

Question 5

265. Autotrophic cells:

a. are not able to use solar energy
b. comprise no chloroplasts
c. are able to absorb and use solar energy
d. comprise no nucleus

Answer 5

c. are able to absorb and use solar energy

Question 6

266. Bacteria flagella propel the cell by using:

a. a whipping like motion
b. two flagella that move in opposite direction, like a flutter kick
c. a rotating motion
d. a flicking motion

Answer 6

a rotating motion

Question 7

267. Immunity reaction of human organism:

a. is entirely innate
b. is developed individually in everybody during ontogenesis
c. is provided chiefly by the activity of phagocytising cells
d. is in all healthy people directed against identical infections

Answer 7

b. is developed individually in everybody during ontogenesis

Question 8

268. The cell wall of plant cells:

a. is semipermeable
b. does not perfuse water
c. is permeable
d. perfuses organic substances

Answer 8

c. is permeable

Question 9

269. Which kind of cells possess the cell walls?

a. animal cell
b. plant cells
c. fibroblasts
d. myocytes

Answer 9

plant cells

Question 10

270. A characteristic that distinguishes chordates from other animals is:

a. a notochord
b. a nerve cord
c. pharyngeal slits
d. all of the above

Answer 10

d. all of the above

Question 11

271. The cellular type of specific immunity in people is provided by ?

Answer 11

T lymphocytes

Question 12

272. Life of the cell ensured by mitosis and interphase is called ?

Answer 12

cell cycle

Question 13

273. In which phase of mitosis longitudinal division of chromosomes occurs?

Answer 13

in anaphase

Question 14

274. Which of the following features of birds is not an adaptation for flight:

a. heavy teeth replaced with a light beak
b. modified hind limbs
c. feathers
d. endothermy and a high metabolic rate

Answer 14

b. modified hind limbs

Question 15

275. The following are changed into plasma cells:

a. T-lymphocytes
b. B-lymphocytes
c. monocytes
d. erythrocytes

Answer 15

b. B-lymphocytes

Question 16

276. Cell division is characterised by two independent processes; caryokinesis and ?

Answer 16

cytokinesis

Question 17

277. The transfer of the genetic information from DNA into the sequence of amino acids in a polypeptide chain is called:

a. replication
b. gene expression
c. transcription
d. conjugation

Answer 17

b. gene expression

Question 18

278. Flat, chisel-shaped teeth are called:

a. molars
b. canines
c. premolars
d. incisors

Answer 18

d. incisors

Question 19

279. The ingestion of microorganisms by the human immunity is called?

Answer 19

phagocytosis

Question 20

280. Substances that retard or completely stop mitosis include:

a. regulators
b. stimulators
c. cytokinetics
d. cytostatics

Answer 20

d. cytostatics