Deck 13 (241 - 260)

Question 1

241. The nucleus is delimited by:

a. one membrane
b. two membrane
c. no membranes
d. nuclear wall

Answer 1

b. two membranes

Question 2

242. All of the following have been proposed as a type of protocell except:

a. coacervates
b. endosymbionts
c. microspheres
d. micelles

Answer 2

b. endosymbionts

Question 3

243. Kidneys of man produce:

a. urea
b. adiuretin
c. urine, which contains water and all the soluble components in equal concentration as those in the blood plasma
d. erythropoietin

Answer 3

Erythropoietin

Question 4

244. Managing, coordinating and reproductive centre of the cell is ?

Answer 4

nucleus

Question 5

245. In the DNA synthesis, the following are the basic monomers:

a. molecules of ATP
b. amino acids
c. proteins
d. deoxyribonucleotides

Answer 5

d. deoxyribonucleotides

Question 6

246. Which of the following organelles is found in the plant cells but not in animal cells:

a. ribosomes
b. mitochondria
c. peroxisomes
d. none of the above

Answer 6

d. none of the above

Question 7

247. Urea in the human body is formed in the ?

Answer 7

liver

Question 8

248. rRNA is formed in ?

Answer 8

nucleolus

Question 9

249. Enzymes are:

a. lipids
b. proteins
c. saccharides
d. deoxyribonucleotides

Answer 9

b. proteins

Question 10

250. Most of the cells are very small. A typical eukaryotic cell, both plant and animals will occur in which of the following range:

a. 1mm to 100 um
b. 10 um to to 1 um
c. 100 um to 10 um
d. 1 um to 100 um

Answer 10

c. 100 um to 10 um

Question 11

251. The filtrate arising in the glomerules of human kidney:

a. is called primary urine
b. is called final urine
c. is identical with human blood plasma
d. is identical with human blood plasma without blood amino-acids

Answer 11

is called primary urine

Question 12

252. Mitochondria are separated from cytoplasm by ?

Answer 12

double membrane

Question 13

253. Chromoplasts are a kind of:

a. pigments
b. nutrients
c. plastids
d. vacuoles

Answer 13

plastids

Question 14

254. The cell that measures 200 um diameter compared to a cell that measures 20 um will have 100 times the surface area but 1000 times the volume:

a. true
b. false

Answer 14

a. true

Question 15

255. The liquid filtered through capillary walls into the Bowmans capsule is called ?

Answer 15

primary urine

Question 16

256. Structures of animal cells with large content of hydrolytic enzymes are ?

Answer 16

lysosomes

Question 17

257. The mRNA has the function:

a. in the translation
b. in the replication of DNA
c. in the transport of nutrient
d. in the energetic metabolism

Answer 17

a. in the translation

Question 18

258. Because they have chloroplasts for energy production, plant cells lack mitochondria:

a. true
b. false

Answer 18

b. false

Question 19

259. During passage of urine through convoluted tubules and Henle’s loop:

a. part of water is reabsorbed
b. waste substances are reabsorbed
c. waste substances pass into the blood through the tubules walls
d. blood is filtered

Answer 19

a. part of water is reabsorbed

Question 20

260. Substances that do not have metabolic activity and are considered to be non-living cell components are:

a. viroids
b. viruses
c. inclusions
d. virions

Answer 20

c. inclusions