LGS Mixed Practice Test #733

Question 1

X-rays were discovered by:‌​‍

Accepted Answer

Roentgen — Wilhelm Roentgen discovered X-rays in 1895. ‌​‍He won the first Nobel Prize in Physics (1901).

Answer

Marie Curie

Answer

Becquerel

Answer

Rutherford

Question 2

A genetic disorder caused by a mutation in the CFTR gene results in abnormal chloride ion transport across cell membranes. Which of the following inheritance patterns is most likely responsible for this disorder?

Accepted Answer

B. Autosomal recessive — Cystic fibrosis, caused by a mutation in the CFTR gene, follows an autosomal recessive inheritance pattern. This means an individual must inherit two copies of the mutated gene (one from each parent) to develop the disorder. Autosomal dominant disorders require only one copy of the mutated gene, while X-linked and Y-linked traits involve sex chromosomes.

Answer

A. Autosomal dominant

Answer

C. X-linked dominant

Answer

D. Y-linked

Question 3

The oldest irrigation project in Kerala is:‌​‍

Accepted Answer

Pothundi — Pothundi (Palakkad) is Kerala's oldest irrigation project, completed in 1927.‌​‍

Answer

Peechi

Answer

Neyyar

Answer

Malampuzha

Question 4

International Women's Day:‌​‍

Accepted Answer

8 Mar — 8 March.‌​‍

Answer

22 Mar

Answer

1 May

Answer

5 Jun

Question 5

Symbol of Sodium:‌​‍

Accepted Answer

Na — Na (Latin: Natrium).‌​‍

Answer

So

Answer

Sd

Answer

No

Question 6

Chain reaction in U-235 occurs because each fission produces:‌​‍

Accepted Answer

~2-3 neutrons (some cause further fissions) — Critical mass needed to sustain chain. ‌​‍Moderator slows neutrons to increase fission probability.

Answer

10 neutrons

Answer

0 neutrons

Answer

1 neutron

Question 7

The National Education Policy 2020 strongly advocates for mother tongue/local language as the medium of instruction. Up to which grade level is this ideally recommended?

Accepted Answer

C. Grade 5 — The NEP 2020 recommends that the medium of instruction until at least Grade 5, but preferably till Grade 8 and beyond, should be the home language/mother tongue/local language/regional language. This policy aims to improve learning outcomes and make education more accessible and engaging for young children. Options A, B, and D are incorrect as the policy explicitly states 'at least till Grade 5'.

Answer

A. Grade 2

Answer

B. Grade 3

Answer

D. Grade 8

Question 8

Heaviest planet:‌​‍

Accepted Answer

Jupiter — Jupiter.‌​‍

Answer

Saturn

Answer

Earth

Answer

Neptune

Question 9

Total AIIMS:‌​‍

Accepted Answer

25+ — 20+ AIIMS (15 operational, more being set up).‌​‍

Answer

20

Answer

7

Answer

15

Question 10

pH of blood is tightly regulated at:‌​‍

Accepted Answer

7.35-7.45 — Blood pH is slightly alkaline; tight homeostasis is life-critical.‌​‍

Answer

1.5-2.0

Answer

5.5-6.0

Answer

8.0-9.0

LGS Mixed Practice Test #733