DCOA Mixed Practice Test #509

Question 1

Error: 'Each of the boys have finished':‌​‍

Accepted Answer

have — 'Each' is singular → 'has' not 'have'.‌​‍

Answer

Each

Answer

boys

Answer

finished

Question 2

Which of the following amino acids is a common precursor for the biosynthesis of many indole alkaloids, such as those found in *Rauwolfia serpentina* (e.g., Reserpine)?

Accepted Answer

B. Tryptophan — Tryptophan is the direct precursor for the biosynthesis of indole alkaloids, including many important compounds like reserpine and vinca alkaloids. Tyrosine and Phenylalanine are precursors for isoquinoline and other aromatic alkaloids, while Ornithine is a precursor for tropane alkaloids.

Answer

A. Tyrosine

Answer

C. Phenylalanine

Answer

D. Ornithine

Question 3

Radio wave propagation at high frequencies (>30 MHz):

Accepted Answer

Line-of-sight/space wave (satellite, troposphere) — Ionosphere fails to reflect >~30 MHz. Need satellites or towers (e.g., TV, FM, mobile).

Answer

Ground wave

Answer

Sky wave

Answer

No propagation

Question 4

Glycolysis, the metabolic pathway that breaks down glucose, primarily occurs in which part of the cell?

Accepted Answer

B. Cytosol — Glycolysis, the initial pathway for glucose catabolism, occurs in the cytosol (cytoplasm) of the cell. Subsequent stages of aerobic respiration, such as the Krebs cycle and oxidative phosphorylation, take place in the mitochondria. The nucleus and endoplasmic reticulum are involved in other cellular functions.

Answer

A. Mitochondria

Answer

C. Nucleus

Answer

D. Endoplasmic Reticulum

Question 5

The Kerala Agrarian Relations Bill, 1957, despite being a landmark legislative attempt, did not achieve immediate widespread implementation in its original form. What was the primary reason for this delay and subsequent re-enactment?

Accepted Answer

C. Constitutional challenges and a presidential intervention led to its eventual striking down and subsequent re-enactment in a modified form. — The Kerala Agrarian Relations Bill, 1957, was initially struck down following constitutional challenges and a presidential intervention, which necessitated its re-enactment as the Kerala Agrarian Relations Act, 1960. This legal and political hurdle was the primary reason for its delayed implementation in its original form. Options A, B, and D do not accurately reflect the main reason for the bill's initial failure to be implemented.

Answer

A. Lack of political will from the ruling government to enforce its provisions against powerful vested interests.

Answer

B. Widespread peasant revolts and tenant protests against the bill's perceived inadequacies.

Answer

D. The severe financial crisis in Kerala made it impossible to fund the compensation required for land acquisition.

Question 6

C.V. Raman won Nobel for:‌​‍

Accepted Answer

Physics — Physics (1930) — Raman Effect (scattering of light).‌​‍

Answer

Literature

Answer

Peace

Answer

Chemistry

Question 7

Malampuzha dam:‌​‍

Accepted Answer

Palakkad — Palakkad district.‌​‍

Answer

Wayanad

Answer

Kannur

Answer

Idukki

Question 8

The chemical symbol for Silver is:‌​‍

Accepted Answer

Ag — Silver's chemical symbol is Ag (from Latin 'Argentum'). ‌​‍Au = Gold (Aurum), Si = Silicon.

Answer

Sv

Answer

Si

Answer

Au

Question 9

Author of Balyakalasakhi:‌​‍

Accepted Answer

Basheer — Vaikom Muhammad Basheer.‌​‍

Answer

MT

Answer

Thakazhi

Answer

Changampuzha

Question 10

SAARC (South Asian Association) was founded in:‌​‍

Accepted Answer

1985 (Dhaka) — SAARC founded 8 December 1985. ‌​‍8 members: India, Pakistan, Bangladesh, Nepal, Bhutan, Sri Lanka, Maldives, Afghanistan (2007). Largely dormant due to India-Pakistan tensions.

Answer

1971

Answer

1991

Answer

2004

DCOA Mixed Practice Test #509