biology MCQs – Page 66

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 Review each marked answer and report any item that may be outdated or unclear.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
1301. Haemoglobin is dissolved in the blood of:___________?
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A. Sponges

B. Earthworm

C. Hydra

D. Cockroach

1302. Most abundant muscles in human beings?
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A. All of these

B. Cardiac Muscles

C. Smooth Muscles

D. Skeletal Muscles
1303. Outer surface of bones is covered by a dense layer of connective tissue, called as ___________ ?
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A. Woven bone

B. Epithelium lining

C. Connective lining

D. Periosteum
1304. AIDS is caused by ________ virus?
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A. HAV

B. Pigs

C. HIV

D. Rabies

1305. lub sound is produced after _________ ?
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A. The bicuspid and tricuspid valves suddenly close

B. The semilunar valves are closed

C. The ventricles are fully contracted

D. The ventricles start to relax

1306. Pineal gland situated in________?
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A. Neck

B. Brain

C. Stomach

D. Above kideys

1307. operculum is present in________?
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A. sea fish

B. cartilaginous fish

C. bony fish

D. None of these

1308. Length of membranous urethra is about ___________ ?
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A. 9 cm

B. 5 cm

C. 2 cm

D. 1 cm
1309. DNA of mitochondria is__________?
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A. straight

B. spring

C. All of these

D. circular
1310. Which of the following cell organelles is absent in animal cells and present in a plant cell?
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A. Mitochondria

B. Cell wall

C. Cytoplasm

D. Vacuoles

1311. Which one of the following animal has two separate circulatory pathways?
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A. Frog

B. Shark

C. Whale

D. Lizard

1312. The elimination of toxic nitrogenous waste and excess water in man is by______?
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A. Circulation

B. Pollution

C. Reproduction

D. Excretion
1313. Major Biological Issues of today________?
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A. Addictive drugs

B. Human population growth

C. All of these

D. Pollution

E. Infectious diseases

1314. Laws of segregation and dominance were given by ________?
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A. Morgan

B. De Vries

C. Mendel

D. Darwin

1315. Linnaeus published the list of names of plants in___________?
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A. 1753

B. 1754

C. 1755

D. 1752

1316. PH of fresh Saliva?
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A. 8

B. 6

C. 7

D. 0

1317. Prokaryotes dont have:________?
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A. Nucleus

B. Cell membrane

C. None of these

D. Cytoplasm

1318. The sum of genes in a population is called ________?
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A. Lethal gene

B. Gene pool

C. Karyotype

D. Genotype

1319. Cotton, wool, silk are examples of ____________ ?
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A. Natural Fibres

B. Animal Fibres

C. Synthetic Fibres

D. Plant Fibres

1320. Insects responsible for transmitting diseases are called___________?
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A. None of these

B. Vectors

C. Hybirds

D. Drones