When a red blood cell loses water by osmosis the shrinking of the cell volume leads to crinkling of the plasma membrane, called

• Flacidity

• Bursting

• Crenation

• Tonicity

Which one from those given below represents the position of nitrogen in the 9-membered double rings of purines?

• 2, 4, 6 and 8

• 1, 3, 7 and 9

• 1, 4, 8 and 9

• 3, 5, 7 and 8

The most common type of ovule found in angiosperms is

• Anatropous ovule

• Atropous ovule

• Campylotropous ovule

• Hemitropous ovule

Pick the reaction from the following, where a water molecule is removed and reduction of NAD⁺ does not occur in the reactions of respiration.

I. Succinic acid $\to$ Fumaric acid
II. Malic acid  $\to$ Oxaloacetic acid
III. 2-phosphoglycerate $\to$ phosphoenol pyruvic acid
IV. Pyruvic acid $\to$ Acetyl Co-A

The correct answer is

• I, IV

• I, II

• II, III

• I, III

The largest type of nematocysts in Hydra is

• Holotrichous isorhizas

• Atrichous isorhizas

• Desmonemes

• Stenoteles

Myelin sheaths

• are abundant in nervous system of non- vertebrates

• consists largely of lipids

• has a low electric resistance

• allows the continous conduction of impulse

Match the following Columns.

Column I	Column II
A. Hyperthyroidism	1. Myxedema
B. Hyposecretion of glucocorticoids	2. Addison's disease
C. Hypothyroidism- I	3. Increased metabolic rate
D. Hyperparathyroidism	4. Cushing's syndrome 5. Kidney stone

• A- 3; B- 2; C- 1; D- 5

• A- 3; B- 4; C- 1; D- 2

• A- 1; B- 4; C- 3; D- 2

• A- 1; B- 2; C- 3; D- 5

Choose the correct statements with regard to human respiration.

I. Inspiration is facilitated by the contraction of phrenic and internal intercostal muscles.

II. Healthy human can inhale or exhale about 2000 to 3000 mL of air per minute.

III. Functional residual capacity represent the volume of left out air in lungs after expiration.

IV. Total lung capacity is the total volume of air that can be accomodated in the lung after forced inspiration.

The correct answer is

• I, III

• II, IV

• III, IV

• I, II

Taenidia is the vital component of which system in human body?

• Respiratory system

• Digestive system

• Excretory system

• Reproductive system

Pacinian corpuscles found in the skin are sensitive to

• touch

• pressure

• temperature (hot and cold)

• vibrations