AP Inter 2nd Year Zoology Answer Key 2026 OUT: Paper Moderate as per Student Reviews

Q. No

Question

Answer

Section A

1

What is chyme?

Chyme is the acidic, semi-fluid mass of partially digested food formed in the stomach by the action of gastric juices and mechanical churning.

2

What are the columns of Bertin?

These are the inward extensions of the renal cortex that occupy the spaces between the renal pyramids in the kidney's medulla.

3

What is the triad system?

In skeletal muscle, a triad consists of a T-tubule flanked by two terminal cisternae of the sarcoplasmic reticulum, essential for calcium release.

4

Name the keystone bone of the cranium. Where is it located?

The Sphenoid bone is the keystone bone. It is located in the middle part of the base of the skull, articulating with all other cranial bones.

5

What is 'insulin shock'?

It is a state of severe hypoglycemia caused by excess insulin in the blood, leading to disorientation, shock, or coma if sugar is not provided.

6

"Colostrum is very much essential for the newborn infants." Justify.

Colostrum contains high concentrations of IgA antibodies, providing passive immunity to protect the infant against infections.

7

Draw a labelled diagram of a sperm.

A sperm consists of a Head (with acrosome/nucleus), Neck, Middle piece (with mitochondria), and a Tail.

8

Why did the Govt. of India legalize MTP?

MTP was legalized to reduce maternal mortality from unsafe illegal abortions and to provide a legal outlet for pregnancies from rape or contraceptive failure.

9

What is a tomogram?

A tomogram is a cross-sectional image of a specific "slice" of the body produced by a CT scan or similar radiographic technique.

10

MRI scan is harmless.' Justify.

MRI is considered harmless because it uses strong magnetic fields and radio waves instead of ionizing radiation (like X-rays), avoiding DNA damage.