LGS Mixed Practice Test #612

Question 1

Calicut University:

Accepted Answer

1968 — 1968.

Answer

1975

Answer

1980

Answer

1985

Question 2

Raja Ravi Varma from:‌​‍

Accepted Answer

Kilimanoor, Kerala — Kilimanoor palace — 1848.‌​‍

Answer

TVM

Answer

Kochi

Answer

Thrissur

Question 3

A school in a rural area of Kerala is struggling with outdated infrastructure, lack of digital learning tools, and low community engagement, leading to declining enrollment. Which of the following Kerala Education Department initiatives would primarily address these multifaceted challenges comprehensively?

Accepted Answer

B. Samagra Shiksha Kerala — Samagra Shiksha Kerala is a comprehensive program that integrates various previous schemes, aiming for holistic development of school education, including infrastructure, digital education, community participation, and quality improvement. The KITE Project focuses specifically on IT infrastructure and digital learning, while Victers Channel is a digital learning platform, and Bhasha Poshanam is for language development, none of which offer the complete, multifaceted solution needed.

Answer

A. KITE Project

Answer

C. Victers Channel

Answer

D. Bhasha Poshanam

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 frequency of AC supply in India is:‌​‍

Accepted Answer

50 Hz — India uses 50 Hz AC; USA uses 60 Hz.‌​‍

Answer

220 Hz

Answer

100 Hz

Answer

60 Hz

Question 6

In the body's primary extracellular fluid buffer system, which pair of components works together to swiftly neutralize excess acids or bases, thereby maintaining blood pH within a narrow range?

Accepted Answer

B. Carbonic acid and bicarbonate ions — The bicarbonate buffer system, consisting of carbonic acid (H2CO3) and bicarbonate ions (HCO3-), is the most important extracellular buffer for maintaining blood pH. It can rapidly neutralize both acids and bases. Hemoglobin and plasma proteins are also buffers, and phosphate/ammonia are important renal buffers, but the bicarbonate system is the primary extracellular one. Sodium and chloride are electrolytes, not buffers.

Answer

A. Hemoglobin and plasma proteins

Answer

C. Phosphate and ammonia

Answer

D. Sodium and chloride

Question 7

When you accidentally touch a hot stove, your hand quickly recoils before you even consciously register the pain. This rapid, involuntary action is mediated by a reflex arc. Which part of the nervous system is NOT directly involved in the immediate effector response of a simple reflex arc?

Accepted Answer

D. Cerebrum — A typical reflex arc involves a sensory neuron (detects stimulus), an interneuron (processes in the spinal cord), and a motor neuron (activates muscle). The cerebrum is responsible for conscious thought, perception, and voluntary actions, which occur after or parallel to the immediate reflex action, not as part of its direct pathway.

Answer

A. Sensory neuron

Answer

B. Motor neuron

Answer

C. Interneuron

Question 8

Neutrino hypothesis proposed by:

Accepted Answer

Pauli (to conserve energy in β-decay) — 1930 'desperate remedy'. Named by Fermi. Detected 1956 (Cowan-Reines). Kajita-McDonald Nobel 2015 for neutrino oscillations.

Answer

Fermi

Answer

Dirac

Answer

Heisenberg

Question 9

van't Hoff factor i for dilute NaCl (full dissociation):‌​‍

Accepted Answer

2 — NaCl → Na⁺ + Cl⁻ (i=2). ‌​‍CaCl₂ (i=3). Helps understand why electrolytes affect colligative properties more.

Answer

Varies

Answer

1

Answer

3

Question 10

The ear bones (ossicles) are named:‌​‍

Accepted Answer

Malleus, incus, stapes — Three middle-ear ossicles transmit vibrations to the cochlea.‌​‍

Answer

Femur, tibia, fibula

Answer

Ulna, radius, humerus

Answer

Skull, jaw, neck

LGS Mixed Practice Test #612