DCOA Mixed Practice Test #394

Question 1

Which step in the action research cycle involves planning and implementing changes based on initial findings?

Accepted Answer

C. Taking action — The 'Taking action' step involves planning and implementing changes based on data analysis, making option C correct. Option A is incorrect as it refers to the initial problem identification. Option B is incorrect as it focuses on data collection and analysis. Option D is incorrect as it pertains to the reflection phase after action has been taken.

Answer

A. Identifying the problem

Answer

B. Collecting and analyzing data

Answer

D. Reflecting on outcomes

Question 2

Russia-Ukraine war 3rd anniversary:‌​‍

Accepted Answer

Feb 2025 — Feb 2025.‌​‍

Answer

Feb 2023

Answer

Feb 2026

Answer

Feb 2024

Question 3

Ozone layer is in which layer of atmosphere?‌​‍

Accepted Answer

Stratosphere — The ozone layer is in the Stratosphere (~15-35 km altitude). ‌​‍It absorbs UV radiation.

Answer

Troposphere

Answer

Mesosphere

Answer

Thermosphere

Question 4

An enzyme's activity is highly dependent on its three-dimensional structure. Which of the following factors, if altered significantly, is most likely to cause irreversible denaturation of an enzyme, leading to loss of its catalytic function?

Accepted Answer

C. Extreme temperature changes. — Extreme changes in temperature (or pH) can disrupt the weak bonds maintaining an enzyme's specific three-dimensional structure, leading to irreversible denaturation and loss of function. Substrate concentration changes or competitive inhibitors affect reaction rate but do not typically cause irreversible structural damage to the enzyme itself. Optimal pH adjustment would enhance, not harm, enzyme activity.

Answer

A. Slight increase in substrate concentration.

Answer

B. Optimal pH adjustment.

Answer

D. Presence of a competitive inhibitor.

Question 5

Which vitamin deficiency causes 'Night Blindness'?‌​‍

Accepted Answer

Vitamin A — Vitamin A (Retinol) deficiency causes Night Blindness (Nyctalopia). ‌​‍Rich sources: carrot, papaya, milk, liver.

Answer

Vitamin C

Answer

Vitamin D

Answer

Vitamin B

Question 6

Marayoor dolmens:‌​‍

Accepted Answer

Idukki — Muniyara — Idukki.‌​‍

Answer

Thrissur

Answer

Palakkad

Answer

Wayanad

Question 7

RBC lacks:‌​‍

Accepted Answer

Nucleus — Mature mammalian RBCs have no nucleus.‌​‍

Answer

Cytoplasm

Answer

Membrane

Answer

Haemoglobin

Question 8

An authentic scientifically written book on Koodiyattam:‌​‍

Accepted Answer

Natya Kalpadrumam — Natya Kalpadrumam by Mani Madhava Chakyar is the classic treatise on Koodiyattam.‌​‍

Answer

Hasta Lakshana Deepika

Answer

Thapathi Samvaranam

Answer

Natya Shastra

Question 9

The electronic configuration of sodium (Z=11) is:‌​‍

Accepted Answer

2,8,1 — Na has 11 electrons: 2 in K, 8 in L, 1 in M shell.‌​‍

Answer

2,7,2

Answer

2,9

Answer

2,8,2

Question 10

If an object returns to its starting point, its displacement is:

Accepted Answer

Zero — Displacement = change in position; if back to start, net displacement = 0.

Answer

Maximum

Answer

Equal to distance

Answer

Infinity

DCOA Mixed Practice Test #394