biology MCQs – Page 47

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 Review each marked answer and report any item that may be outdated or unclear.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
921. Which of the following statement about an arthropod exoskeleton is incorrect?
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A. It permits gaseous exchange

B. Like all the other types of exoskeleton, they lack sensation

C. It provides muscle attachment

D. It contains joints, for the same purpose as present in human skeletal system
922. Ground pries are also known as___________?
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A. Lycopods

B. Spike mosses

C. Both of these

D. None of these

923. Exoskeleton of a marine snail is composed of________________?
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A. CaSO4

B. CaCO3

C. CaPO4

D. SiO2

924. Insertion of Biceps is on_________?
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A. Radius

B. Ulna

C. Olecronon process of ulna.

D. Scapula

925. Which of the following is a chemical link between catabolism and anabolism?
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A. AMP

B. ADP

C. All of these

D. ATP
926. Which of the following hormone is predominantly responsible for bone weakening in older women?
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A. Calcitonin.

B. Oestrogen.

C. Progesterone.

D. Parathyroid hormone.

927. Type of sensations carried by nociceptors are_________________?
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A. Pressure.

B. Temperature.

C. Touch.

D. Pain
928. Important factors which affect the capacity of haemoglobin to combine with oxygen is
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A. pH

B. All of these

C. Carbon dioxide

D. Temperature

929. Which of the following animal uses Setae and Muscles for their Iocomotion?
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A. Earthworm

B. Star fish

C. Snail

D. Cockroach

930. What happens during muscle contraction to the length of each myosin and action filament?
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A. There is no change in sarcomere

B. A band becomes short

C. Z- lines get closer

D. 1 band elongates

931. Visible light used in photosynthesis ranges from:__________?
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A. 380 750 nm in wavelength

B. 390 790 nm in wavelength.

C. 350 750 nm in wavelength

D. 300 700 nm in wavelength

932. Na+ -K+ ATPase pump is important for_______________?
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A. Maintenance of resting potential

B. Massive out flux of K+ after depolarization

C. Conversion of resting potential into action potential

D. Recovery of resting potential
933. More than ___________ compounds of tar of tobacco smoke are involved to cause cancer?
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A. 90

B. 5

C. 10

D. 15

934. Which of the following is present inside the vertebral column______________?
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A. Brain

B. Spinal cord

C. Both of these

D. none of these.

935. The point at which there is no net exchange of gases between leaves and atmosphere is known as_____________?
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A. Compensation point

B. Neutral point

C. Parallel point

D. Competitive point

936. All of the following contain cartilage except:___________?
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A. Bronchioles

B. Trachea

C. Larynx

D. Bronchi

937. Production of two types of spores is known as________________?
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A. Homospory

B. Gamospory

C. Heterospory

D. Heterogamy

938. Chlorosis, i.e., yellowish hue on the leaves results from_____________?
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A. Deficiency of chlorophyll.

B. Short supplies of mineral nutrients in the soil.

C. Accumulation of toxic waste products in leaves.

D. All of these
939. Reflex actions below the neck are under control of____________?
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A. Spinal cord

B. Brain

C. Hypothalamus

D. none of these.

940. Chlorophylls mainly absorb _________ wavelengths?
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A. Violet red

B. Yellow orange

C. Orange blue

D. Orange red.