HSA Mixed Practice Test #389

Question 1

Dispersion in prism occurs because:‌​‍

Accepted Answer

Different wavelengths have different refractive indices — Violet bends most (highest n), red least. ‌​‍Forms spectrum. Rainbows: droplet dispersion + internal reflection.

Answer

Prism refracts light

Answer

Colour changes

Answer

Interference

Question 2

Money Bill introduced in:‌​‍

Accepted Answer

LS only — Lok Sabha only.‌​‍

Answer

RS only

Answer

Either House

Answer

Joint Session

Question 3

Kerala's 'Responsible Tourism' initiative was first piloted in:

Accepted Answer

Kumarakom — Kerala's Responsible Tourism Mission was first piloted in Kumarakom in 2007-08 before expanding statewide.

Answer

Munnar

Answer

Kovalam

Answer

Thekkady

Question 4

KPSC online services:

Accepted Answer

Thulasi portal, OTR — Thulasi is the official KPSC portal.

Answer

None

Answer

Only office

Answer

Only SMS

Question 5

A 15-year-old student frequently argues with parents about rules but seeks peer approval. Which of the following best explains this behavior in terms of adolescent social development?

Accepted Answer

C. Imaginary Audience (Elkind) — Elkind's Imaginary Audience theory explains the adolescent tendency to believe they are constantly being observed and judged by peers, leading to heightened sensitivity to peer approval. Erikson's stage relates to identity formation, Kohlberg's to moral reasoning, and Festinger's theory focuses on comparing oneself to others, though less directly.

Answer

A. Identity vs. Role Confusion (Erikson)

Answer

B. Conventional Morality (Kohlberg)

Answer

D. Social Comparison Theory (Festinger)

Question 6

Pampa river length:‌​‍

Accepted Answer

176 km — 176 km — third longest in Kerala.‌​‍

Answer

144 km

Answer

209 km

Answer

244 km

Question 7

Which blood cells fight infection?‌​‍

Accepted Answer

WBC — WBC (White Blood Cells / Leucocytes) fight infection as part of the immune system.‌​‍

Answer

RBC

Answer

Platelets

Answer

Plasma

Question 8

Many enzymes require non-protein components to exhibit their catalytic activity. These components, if organic molecules, are often referred to as coenzymes. What is the primary function of a coenzyme in an enzymatic reaction?

Accepted Answer

C. To carry chemical groups or electrons between enzymes. — Coenzymes are organic non-protein molecules that often function as intermediate carriers of electrons or specific chemical groups (e.g., phosphate, acetyl, methyl groups) during enzymatic reactions. They assist enzymes in catalysis by facilitating the transfer of these groups, without being consumed in the overall reaction. They do not provide activation energy or inhibit enzymes.

Answer

A. To provide the activation energy for the reaction.

Answer

B. To act as a competitive inhibitor of the enzyme.

Answer

D. To irreversibly bind to the active site and denature the enzyme.

Question 9

In Kerala, 'Vayana Dinam' (Reading Day) is observed on June 19th. Which prominent figure's death anniversary is commemorated on this day, emphasizing the importance of reading and literacy?

Accepted Answer

B. P.N. Panicker — Vayana Dinam, or Reading Day, in Kerala is observed on June 19th, marking the death anniversary of P.N. Panicker. He is widely known as the 'Father of the Library Movement' in Kerala, and his efforts significantly contributed to promoting literacy and reading habits across the state. The other figures are prominent in Kerala but not directly associated with Reading Day in this context.

Answer

A. E.M.S. Namboodiripad

Answer

C. A.K. Gopalan

Answer

D. Kumaran Asan

Question 10

Indian quantum communication:‌​‍

Accepted Answer

QKD demo — Indian demonstrations of QKD.‌​‍

Answer

ISRO

Answer

Abroad only

Answer

None

HSA Mixed Practice Test #389