KAS Prelims Mixed Practice Test #890

Question 1

Skin layers:

Accepted Answer

Epidermis, dermis, hypodermis — Three main layers.

Answer

Only one

Answer

Two

Answer

Four

Question 2

An adolescent frequently changes their style of dress, musical preferences, and friend groups, expressing confusion about who they 'really are.' This struggle is primarily related to which developmental task?

Accepted Answer

C. Forming a sense of identity — According to Erik Erikson's stages of psychosocial development, the primary task for adolescents (ages 12-18) is 'Identity vs. Role Confusion.' This involves exploring different roles, beliefs, and behaviors to form a coherent sense of self. The described changes and confusion directly reflect this struggle for identity.

Answer

A. Developing intimate relationships

Answer

B. Achieving industry

Answer

D. Mastering concrete operations

Question 3

Antonym of DARK:

Accepted Answer

Light — Dark ↔ light.

Answer

Dim

Answer

Black

Answer

Shadow

Question 4

Two trains same direction. 60 km/h and 40 km/h. Relative:

Accepted Answer

20 — Difference=20.

Answer

100

Answer

80

Answer

40

Question 5

An allergy is:

Accepted Answer

An exaggerated immune response to a harmless substance — Allergies (hay fever, asthma, food allergy) involve hypersensitivity — typically IgE-mediated.

Answer

A normal metabolic process

Answer

Viral infection

Answer

Cell death

Question 6

Kerala's first woman DGP:‌​‍

Accepted Answer

B. Sandhya — B. Sandhya.‌​‍

Answer

Lakshmi

Answer

Sheela Bose

Answer

R. Sreelekha

Question 7

The 'Dowry Prohibition Act' in India was enacted in:

Accepted Answer

1961 — Dowry Prohibition Act, 1961 — first anti-dowry legislation.

Answer

1955

Answer

1976

Answer

1986

Question 8

What type of energy does a solar cell convert into electricity?‌​‍

Accepted Answer

Light to electricity — Photovoltaic effect.‌​‍

Answer

Wind to electricity

Answer

Sound to electricity

Answer

Heat to electricity

Question 9

Bile is produced by:‌​‍

Accepted Answer

Liver (stored in gall bladder) — Contains bile salts (emulsify fats), bilirubin (RBC breakdown), cholesterol. ‌​‍Not an enzyme — helps lipase.

Answer

Gall bladder

Answer

Stomach

Answer

Pancreas

Question 10

An enzyme's activity is highly dependent on its three-dimensional structure. Which of the following factors, if altered significantly, is most likely to cause irreversible denaturation of an enzyme, leading to loss of its catalytic function?

Accepted Answer

C. Extreme temperature changes. — Extreme changes in temperature (or pH) can disrupt the weak bonds maintaining an enzyme's specific three-dimensional structure, leading to irreversible denaturation and loss of function. Substrate concentration changes or competitive inhibitors affect reaction rate but do not typically cause irreversible structural damage to the enzyme itself. Optimal pH adjustment would enhance, not harm, enzyme activity.

Answer

A. Slight increase in substrate concentration.

Answer

B. Optimal pH adjustment.

Answer

D. Presence of a competitive inhibitor.

KAS Prelims Mixed Practice Test #890