biology MCQs – Page 63

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
1241. New alleles can be introduced into a populations gene pool by:_________?
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A. Mutation

B. Natural selection

C. Gene flow

D. Both A & C
1242. Zygote with three copies chromosome 21, is known to cause _________?
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A. Hay fever

B. Parkinson Disease

C. Downs syndrome

D. Scurvy

1243. The cardio respiratory capacity is related to____________?
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A. Agility

B. Flexibility

C. Normal physical endurance

D. Strength

1244. What does lalopathy mean?
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A. A disorder of speech

B. A disorder of hearing

C. A disorder of learning

D. None of the above

1245. Lampbrush chromosomes are found inside _______?
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A. Salvary gland of silk moth

B. Salvary glands of Drosophila

C. Nucleus of man

D. Oocytes of frog
1246. Dorsal root of spinal nerves contain only __________ ?
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A. Receptor neurons

B. Stimulators

C. Effectors neurons

D. Detector neurons

1247. Membrane that separates cytoplasm and nucleus is called ___________ ?
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A. Cell wall

B. Cell membrane

C. Nuclear envelop

D. Boundary

1248. _________ stimulates the production of gastric juice in the stomach:
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A. Rennin

B. Enterokinase

C. Gastrin

D. None of these

1249. Smallest bone of human body is?
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A. vomer

B. stapes

C. occipital

D. navicular

1250. Which of the following cell organelles does not contain DNA?
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A. Lysosomes

B. Chloroplast

C. None of these

D. Nucleus

1251. If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have___________?
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A. 20 chromosomes

B. While some other will have 20

C. 10 chromosomes

D. 40 chromosomes

1252. Which area of the brain does mathematical process occur?
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A. The left parietal lobe

B. Mid brain

C. The right parietal lobe

D. cerebrum

1253. Typhoid is caused by_________?
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A. None of the above

B. Hepatatis

C. Bacillus

D. Salmonella typhi
1254. Which of the following is a disease caused by deficiency of protein in children?
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A. Pellagra

B. Rickets

C. Marasmus

D. Beri-Beri

1255. Which tube joins kidneys and bladder?
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A. Suprapubic Tube

B. Inferno Verna Cava

C. Uretar

D. Urethra

1256. Nobel prize to Komberg and Ochoa was given for ________?
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A. One gene one enzyme hypothesis

B. Artificial synthesis of genes

C. Artificial sysnthesis of DNA

D. Chemistry of DNA and RNA

1257. Human blood is a viscous fluid due to_________?
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A. Sodium in serum

B. Proteins in blood

C. Platelets in plasma

D. RBC and WBC in blood

1258. ___________ is a mammal who fly?
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A. Ostrich

B. Peacock

C. Bat

D. None of these

1259. Febries are what kind of cells ?
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A. Chloroplast

B. Sclerenchymatous

C. None of the above

D. Parenchymatous

1260. Pancreas is/are__________?
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A. Endocrine Gland

B. Exocrine Gland

C. All of the above

D. Digestive Gland