LDC Mixed Practice Test #52

Question 1

The main function of erythrocytes (red blood cells) in the human body is to:

Accepted Answer

B. Carry oxygen to tissues — Erythrocytes contain hemoglobin, a protein that efficiently binds to oxygen in the lungs and transports it to various tissues and organs throughout the body. Leukocytes fight infection, platelets initiate clotting, and lymphocytes produce antibodies, which are functions of other blood components.

Answer

A. Produce antibodies

Answer

C. Initiate blood clotting

Answer

D. Fight bacterial infections

Question 2

What is biomagnification?‌​‍

Accepted Answer

Toxin accumulation up food chain — DDT, mercury accumulate.‌​‍

Answer

Reduction

Answer

Nutrient flow

Answer

No effect

Question 3

Sree Narayana Guru's famous Aruvippuram installation was of:‌​‍

Accepted Answer

A Shiva Linga — In 1888, Sree Narayana Guru installed a Shiva Linga at Aruvippuram, challenging the caste monopoly on temple rituals. ‌​‍This was a landmark event in Kerala's social reform movement.

Answer

A mirror

Answer

A cross

Answer

A lamp

Question 4

Which country is known as the 'Dairy Farm of Europe'?

Accepted Answer

Denmark — Denmark is called the Dairy Farm of Europe for its highly organised dairy industry.

Answer

Switzerland

Answer

Ireland

Answer

Italy

Question 5

Melpathur Narayana Bhattathiri:

Accepted Answer

Narayaneeyam — Narayaneeyam — 1586 CE.

Answer

Sanskrit

Answer

Brahmanda Purana

Answer

Rig Veda

Question 6

First Indian Air Chief:‌​‍

Accepted Answer

Subroto Mukherjee — AM Subroto Mukherjee (1954).‌​‍

Answer

Arjan Singh

Answer

Engineer

Answer

Lal

Question 7

Area of circle radius 7 (π=22/7):

Accepted Answer

154 — πr² = 22/7 × 49 = 154.

Answer

44

Answer

77

Answer

22

Question 8

Filippo Brunelleschi is best known for designing the:

Accepted Answer

Dome of Florence Cathedral — Brunelleschi's dome of the Florence Cathedral (Il Duomo) pioneered Renaissance architecture.

Answer

Sistine Chapel ceiling

Answer

Leaning Tower of Pisa

Answer

St Mark's Basilica

Question 9

A teacher wants to foster deep learning and long-term retention of concepts among her students. Based on motivational theories, which approach is most likely to achieve this goal?

Accepted Answer

B. Emphasizing the practical relevance and personal interest of the subject matter. — Emphasizing relevance and personal interest appeals to intrinsic motivation, which is associated with deeper engagement, better understanding, and long-term retention of knowledge. Options A, C, and D are strategies that primarily activate extrinsic motivation, which can lead to superficial learning focused on rewards or avoiding punishment, and may not foster deep, lasting understanding.

Answer

A. Offering significant monetary rewards for top grades.

Answer

C. Implementing strict deadlines and penalties for incomplete assignments.

Answer

D. Conducting frequent competitive exams to rank students.

Question 10

The sum of the squares of the first 5 natural numbers (1²+2²+...+5²) is:

Accepted Answer

55 — 1+4+9+16+25 = 55. Formula n(n+1)(2n+1)/6 = 5·6·11/6 = 55.

Answer

25

Answer

45

Answer

125

LDC Mixed Practice Test #52