DCOA Mixed Practice Test #740

Question 1

Art 51A:‌​‍

Accepted Answer

Fundamental Duties — 11 Fundamental Duties (Part IVA).‌​‍

Answer

Fundamental Rights

Answer

DPSP

Answer

Citizenship

Question 2

'Plaster of Paris' is:

Accepted Answer

CaSO₄·½H₂O — Plaster of Paris = CaSO₄·½H₂O (calcium sulphate hemihydrate).

Answer

CaSO₄·2H₂O

Answer

CaSO₄·5H₂O

Answer

(A) and (C)

Question 3

Down syndrome is caused by an extra copy of chromosome:‌​‍

Accepted Answer

21 — Trisomy 21 (three copies of chromosome 21) causes Down syndrome.‌​‍

Answer

13

Answer

X

Answer

18

Question 4

An enzyme's activity is significantly affected by various factors. Which of the following factors primarily influences the three-dimensional structure of an enzyme, thereby altering its catalytic efficiency?

Accepted Answer

C. pH and temperature — pH and temperature are critical environmental factors that affect the three-dimensional structure (conformation) of an enzyme. Extreme deviations from optimal pH or temperature can cause denaturation, leading to irreversible loss of enzyme activity. Substrate and product concentrations affect reaction rates but not the enzyme's intrinsic structure, while cofactors assist enzyme function but don't primarily alter its structure in this manner.

Answer

A. Substrate concentration

Answer

B. Product concentration

Answer

D. Presence of cofactors

Question 5

Which of the following conditions is a major contraindication for the use of ibuprofen?

Accepted Answer

B. History of peptic ulcer disease. — NSAIDs like ibuprofen inhibit prostaglandin synthesis, which can compromise the protective gastric mucosal barrier. This action can lead to or exacerbate peptic ulcers and increase the risk of gastrointestinal bleeding, making a history of peptic ulcer disease a major contraindication for their use.

Answer

A. Mild hypertension.

Answer

C. Controlled type 2 diabetes.

Answer

D. Seasonal allergies.

Question 6

Dengue is spread by:

Accepted Answer

Aedes mosquito — Aedes aegypti (day-biting) transmits dengue virus; also spreads chikungunya and Zika.

Answer

Culex mosquito

Answer

Anopheles mosquito

Answer

Housefly

Question 7

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 lamp

Answer

A cross

Question 8

'Discovery of India' was written by:‌​‍

Accepted Answer

Jawaharlal Nehru — Jawaharlal Nehru wrote Discovery of India in 1946 while in prison.‌​‍

Answer

Gandhi

Answer

Ambedkar

Answer

Tagore

Question 9

Solar-powered airport:‌​‍

Accepted Answer

Kochi — Cochin International Airport (CIAL) — world's first fully solar-powered airport (2015).‌​‍

Answer

TVM

Answer

Kozhikode

Answer

Kannur

Question 10

The Age of Consent Act, raising the minimum age of marriage for girls to 12, was passed in:

Accepted Answer

1891 — Age of Consent Act 1891 was driven by Behramji Malabari after 'Phulmani case'.

Answer

1856

Answer

1872

Answer

1929

DCOA Mixed Practice Test #740