LGS Mixed Practice Test #651

Question 1

Where is the headquarters of the Central Plantation Crops Research Institute located in Kerala?‌​‍

Accepted Answer

Kasaragod — CPCRI is at Kudlu, Kasaragod district.‌​‍

Answer

Nileswaram

Answer

Palode

Answer

Kayamkulam

Question 2

Which of the following vitamins acts as a precursor for coenzymes NAD+ and NADP+, which are crucial for numerous metabolic redox reactions?

Accepted Answer

C. Vitamin B3 (Niacin) — Vitamin B3, also known as Niacin, is the precursor for the coenzymes Nicotinamide Adenine Dinucleotide (NAD+) and Nicotinamide Adenine Dinucleotide Phosphate (NADP+). These coenzymes are essential electron carriers in many metabolic pathways, including glycolysis, the citric acid cycle, and fatty acid synthesis. The other vitamins listed have different coenzyme forms and roles in metabolism.

Answer

A. Vitamin C (Ascorbic Acid)

Answer

B. Vitamin B1 (Thiamine)

Answer

D. Vitamin B12 (Cobalamin)

Question 3

Salivary amylase digests:‌​‍

Accepted Answer

Starch — Salivary amylase (ptyalin) starts starch → maltose breakdown in the mouth.‌​‍

Answer

Proteins

Answer

Cellulose

Answer

Fats

Question 4

Pyridoxal phosphate (PLP) is the active coenzyme form of which water-soluble vitamin, playing a vital role in various metabolic reactions, especially those involving amino acids like transamination and decarboxylation?

Accepted Answer

C. Vitamin B6 (Pyridoxine) — Pyridoxal phosphate (PLP) is the active coenzyme form of Vitamin B6 (Pyridoxine). It is essential for numerous enzymatic reactions, particularly in amino acid metabolism, including transamination, decarboxylation, and racemization. Thiamine (B1) forms TPP, Riboflavin (B2) forms FAD/FMN, and Cobalamin (B12) functions in specific methylation and isomerase reactions.

Answer

A. Vitamin B1 (Thiamine)

Answer

B. Vitamin B2 (Riboflavin)

Answer

D. Vitamin B12 (Cobalamin)

Question 5

Molar conductivity Λm variation with dilution (strong electrolyte):‌​‍

Accepted Answer

Increases linearly approaching Λm° at infinite dilution — Kohlrausch law: Λm = Λm° - A√c. ‌​‍Weak electrolytes: not linear; degree of dissociation grows.

Answer

Decreases

Answer

Constant

Answer

Exponential

Question 6

Kerala's electrification year (100%):‌​‍

Accepted Answer

2017 — First fully electrified state — 2017.‌​‍

Answer

2019

Answer

2015

Answer

2021

Question 7

India won how many medals at the Paris Olympics 2024?‌​‍

Accepted Answer

6 — India won 6 medals at Paris 2024: 1 silver (Neeraj Chopra) and 5 bronze medals.‌​‍

Answer

4

Answer

7

Answer

5

Question 8

Which of the following is the most critical step in microteaching that ensures the teacher’s skill is effectively demonstrated and evaluated?

Accepted Answer

D. Providing immediate feedback to the learner after the session — Microteaching emphasizes immediate feedback to refine skills. While selecting engaging topics (A) and using aids (C) are important, the core of microteaching is the feedback loop (D). Breaking skills into components (B) is preparatory but not the critical step.

Answer

A. Selecting the topic based on student interest

Answer

B. Breaking the skill into smaller, teachable components

Answer

C. Using audiovisual aids to enhance teaching effectiveness

Question 9

First talkie in Malayalam:‌​‍

Accepted Answer

Balan — Balan (1938).‌​‍

Answer

Jeevitha Nauka

Answer

Marthanda Varma

Answer

Vigathakumaran

Question 10

World Press Freedom Day is observed on:‌​‍

Accepted Answer

3 May — 3 May is UNESCO-declared World Press Freedom Day.‌​‍

Answer

10 December

Answer

15 September

Answer

21 March

LGS Mixed Practice Test #651