biology MCQs – Page 52

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 Review each marked answer and report any item that may be outdated or unclear.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
1021. Exceptionally the positive hydrostatic pressure generated by root pressure is about___________?
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A. 600 Kpa

B. 800 Kpa

C. 900 Kpa

D. 1000 Kpa

1022. Which among the following is an Autotroph _________ ?
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A. Fish

B. Butterfly

C. Mushroom

D. Algae
1023. The pressure generated when water enters & inflates plant cells is called ___________ potential?
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A. Water

B. Osmotic

C. Solute

D. Pressure
1024. Which Part of the Brain Regulates Body Temperature?
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A. medulla

B. cerebrum

C. hypothalamus

D. cerebellum

1025. Purine and pyrimidine metabolism results in production of____________?
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A. None of these

B. Xanthine

C. Creatinine

D. Trimethyamine oxide

1026. The simplest amino acid is_________?
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A. valine

B. glycine

C. alanine

D. phenylalanine

1027. The bristles on the body of the cockroach arise from__________?
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A. Basement membrane

B. Malpighian cell

C. Epidermis

D. Trichogen cell
1028. Which excretory product in produced in plants during autotrophic mode of life?
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A. CO2

B. H2O

C. O2

D. Both A and B

1029. A stone measuring 0.4 cm, blocking the outlet of renal pelvis resulting in mild to moderate tract obstruction. Which of the following technique will be opted to remove this stone?
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A. Kidney surgery

B. None of these

C. Extracorporeal Shock wave lithotripsy

D. Burring a hole and removing the stone manually (nephrolithotomy)

1030. The normal pH of human blood is____________?
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A. 6.4

B. 7.5

C. 7.4

D. 7

1031. The biggest group of invertebrates is_________?
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A. Worms

B. None of these

C. Insects

D. Jelly fish

1032. The hormone that helps in Parthenocarpy?
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A. Abscisic acid

B. Ethylene

C. Gibberellin

D. Cytokinin

1033. Open circulatory system can contain_________?
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A. All of these

B. Haemoglobin

C. Red Blood Cells

D. White Blood Cells
1034. Which bone is called beauty bone in women?
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A. clavicle

B. sternum

C. radius

D. maxilla

1035. Low level of CO2 favours _________ of the stomata.
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A. Opening

B. Closure

C. Both of these

D. None of these

1036. Xylem and phloem are conducting tissues found in .?
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A. micro orgamnisms

B. all the above

C. plants

D. animals

1037. In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen?
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A. nematoda

B. echinodermata

C. arthropoda

D. mollusca

1038. Brown fat present in certain mammals is specialized in___________?
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A. Providing insulation in cold environment.

B. Providing insulation in hot environment

C. Rapid heat production.

D. Controlling heat production.

1039. Animals living in the Tree trunks are known as___________?
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A. Amphibious

B. Volant

C. Aquaticx

D. Arboreal
1040. It has been estimated that in a normal person plasma constitutes about ________ by volume of blood.
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A. 55%

B. 75%

C. 45%

D. 35%