biology MCQs – Page 38

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 Review each marked answer and report any item that may be outdated or unclear.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
741. Which of the following is second largest part of the brain_______________?
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A. Thalamus

B. Hypothalamus

C. Cerebrum

D. Cerebellum
742. Acromegaly is caused due to oversecretion of____________?
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A. STH

B. Thyroxin

C. ACTH

D. TSH

743. In an annelids, the contraction of circular muscle results in___________?
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A. Shortening of the body.

B. Thinning of body

C. Lengthening of the body.

D. Widening of body

744. The organisms able to use sunlight directly as a source of energy are_____________?
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A. Fungi

B. Animals

C. Plants

D. Omnivores

745. Breaking of terminal phosphate of ATP releases about ___________ Kcal of energy?
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A. 7.3

B. 6.3

C. 6.1

D. 7.1

746. Hydra has___________?
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A. All of these

B. Nerves

C. Neuron-cells

D. Brain

747. Any change in the environment of an organism is called___________?
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A. Reaction

B. Stimulus

C. Variation

D. Response

748. Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips___________________?
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A. Pacinian corpuscles

B. None of these

C. Meissners Corpuscles

D. Hair end organs

749. Secretin is a hormone produced by___________?
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A. Pancreas

B. Stomach

C. Duodenum

D. Liver

750. Horsetails are included in class of____________?
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A. Pteropsida

B. Lycopsida

C. Psilopsida

D. Sphenopeida
751. Which of the following is antagonist to Auxin in terms of promotion of stem growth______________?
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A. Cytokinins

B. Gibberellins

C. Abscisic Acid

D. none of these.

752. Which of the following is largest part of brain?
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A. Cerebrum

B. Medulla oblongata

C. Thalamus

D. Cerebellum

753. If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?
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A. Closed Fixation.

B. Open fixation.

C. Open reduction.

D. Immobilization

754. A disease of longs in which inside of the lungs is damaged resulting in cough and fever?
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A. Emphysema

B. Asthma

C. Lung cancer

D. Pulmonary tuberculosis

755. Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ____________?
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A. Chemotactic movement

B. Chemosastic movement

C. Chemotropic movement

D. Haptonastic movement

756. Joint between two parietal bones, which is infact immovable one is an example of_________?
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A. Fibrous joints.

B. Cartilaginous joints.

C. Synovial joints.

D. None of these

757. Reduction in photosynthesis is of____________?
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A. O2

B. CO2

C. H2O

D. light energy

758. Due to which property of Adiantum and example of Filicinae is called Maidenhairfern________________?
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A. Its short thick branched horizontally growing rhizome

B. Shows heteromorphic alternation of generation

C. Stipe (stalk) and rachis of leaf have black smooth and shiny hair like structures

D. Fibrous adventituous roots arise from the lower side of rhizome

759. Monocots are characterized by___________?
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A. Number of sepals and petals are 4 or multiple of 4

B. Number of sepals and petals are 2 or multiple of 2

C. Number of sepals and petals are 5 or multiple of 5

D. Number of sepals and petals are 3 or multiple of 3
760. How many vertebrae are present in coccyx?
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A. 9

B. 7

C. 4

D. 12