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Important Questions on Structural Organisation in Animals

HARD
Given below are the four schematics that describe the dependence of the rate of an enzymatic reaction on temperature. Which of the following combination is true for thermophilic and psychrophilic organisms?

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MEDIUM
Epithelial cells in animals are held by specialized junctions, one of them being "Gap junction". Function of a "Gap junction" is to
EASY
Which of the following is not a function of the skeletal system?
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A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to
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Part of epidermis that keeps out unwanted particles is called:
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Which of the following statements is true about glandular epithelium in the salivary gland?
EASY
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:
MEDIUM
Select the option which is not correct with respect to enzyme action:
HARD
It is much easier for a small animal to run uphill than for a large animal, because:
EASY
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?

(i) They do not need to reproduce

(ii) They are somatic cells

(iii) They do not metabolize

(iv) All their internal space is available for oxygen transport