LGS Mixed Practice Test #837

Question 1

Pulmonary circulation:‌​‍

Accepted Answer

Both A and C — Heart-lungs-heart.‌​‍

Answer

Heart to body

Answer

Lungs to heart

Answer

Heart to lungs

Question 2

Recent IPCC reports consistently highlight an observed trend in extreme weather events globally. Considering these assessments, which of the following statements is most accurate regarding the relationship between climate change and extreme weather?

Accepted Answer

C. Climate change is increasing the frequency and intensity of many pre-existing extreme weather events, such as heatwaves, heavy precipitation, and tropical cyclones. — IPCC reports unequivocally state that human-induced climate change is increasing the frequency and intensity of many extreme weather events globally, including heatwaves, heavy precipitation, and tropical cyclones. While climate change does not create entirely new types of events, it significantly alters the probability and characteristics of existing ones. Natural variability plays a role, but the observed trends in extremes cannot be explained without accounting for human influence.

Answer

A. Climate change causes entirely new types of extreme weather events that have never occurred before.

Answer

B. While climate change influences global average temperatures, it has no significant impact on the frequency or intensity of localized extreme weather events.

Answer

D. The observed increase in extreme weather events is primarily due to natural climate variability, with human-induced climate change playing a minor, insignificant role.

Question 3

Site of Krebs cycle:‌​‍

Accepted Answer

Mitochondrial matrix — Electron transport chain on inner mitochondrial membrane. ‌​‍Glycolysis in cytoplasm.

Answer

Chloroplast

Answer

Ribosome

Answer

Cytoplasm

Question 4

Bohr's radius of hydrogen ground state:

Accepted Answer

~0.53 Å (0.0529 nm) — a₀ = ε₀h²/(πme²) = 0.529 × 10⁻¹⁰ m. nth orbit: rn = n²a₀/Z. Energy: En = -13.6Z²/n² eV.

Answer

~1 nm

Answer

~1 m

Answer

~10⁻¹⁵ m

Question 5

The plant hormone that promotes cell division is:‌​‍

Accepted Answer

Cytokinin — Cytokinins promote cytokinesis and delay senescence.‌​‍

Answer

Abscisic acid

Answer

Auxin

Answer

Ethylene

Question 6

Total internal reflection requires:‌​‍

Accepted Answer

Light going from denser to rarer at angle > critical angle — Used in optical fibres, prisms. Diamond critical angle ~24.4° → brilliance.‌​‍

Answer

Light going from rarer to denser

Answer

Mirror

Answer

Perpendicular incidence

Question 7

Banasura Sagar:

Accepted Answer

Wayanad — earth dam — Largest earth dam in India.

Answer

Palakkad

Answer

Kasaragod

Answer

Malappuram

Question 8

Which institution presents the prestigious Ezhuthachan Puraskaram, the highest literary award instituted by the Government of Kerala?

Accepted Answer

B. Kerala Sahitya Akademi — The Ezhuthachan Puraskaram, Kerala's highest literary honour, is conferred by the Kerala Sahitya Akademi. While other options are related to language or culture in Kerala, only the Sahitya Akademi is the designated body for this specific award. The Department of Cultural Affairs oversees various cultural institutions, but the Akademi is the direct awarding body.

Answer

A. Kerala Bhasha Institute

Answer

C. Department of Cultural Affairs, Government of Kerala

Answer

D. Thunchath Ezhuthachan Malayalam University

Question 9

The mirror used in headlights is:‌​‍

Accepted Answer

Concave — Concave mirrors produce a focused beam of light — used in headlights, torches, and solar cookers.‌​‍

Answer

Plane

Answer

Convex

Answer

Cylindrical

Question 10

While the vast majority of Kerala's rivers flow westwards into the Arabian Sea, a select few exhibit an unusual drainage pattern. Which of the following statements accurately describes the unique characteristic of the Kabani River?

Accepted Answer

C. It flows eastwards, originating in Wayanad and eventually joining the Cauvery river system in Karnataka. — The Kabani River is one of the three east-flowing rivers of Kerala (along with Bhavani and Pambar). It originates in Wayanad district and flows eastwards into Karnataka, where it joins the Cauvery River. This eastward flow is a distinct characteristic, as most other major rivers in Kerala flow westwards into the Arabian Sea. The other options describe features that are either incorrect for the Kabani or not its primary unique characteristic.

Answer

A. It is the longest river originating entirely within Kerala, flowing through three districts before reaching the sea.

Answer

B. It is the only river in Kerala whose entire basin lies within a declared wildlife sanctuary and tiger reserve.

Answer

D. Its waters are primarily utilized for large-scale hydroelectric projects, making it the highest power-generating river.

LGS Mixed Practice Test #837