DCOA Mixed Practice Test #646

Question 1

LED advantage:‌​‍

Accepted Answer

Less energy, longer life — Energy efficient. Last 25,000+ hours.‌​‍

Answer

Brighter only

Answer

More heat

Answer

Cheaper upfront

Question 2

The Hundred Years' War (1337-1453) was fought between:‌​‍

Accepted Answer

England and France — Series of conflicts over French throne. ‌​‍Joan of Arc led French resistance. Ended with French victory; English expelled from France (except Calais).

Answer

Rome and Carthage

Answer

UK and India

Answer

Spain and Portugal

Question 3

Kinship terminology — Iroquois system classes:‌​‍

Accepted Answer

Cross cousins distinct from parallel cousins — Lewis Henry Morgan studied. ‌​‍Cross cousins (father's sister's/mother's brother's children) preferred marriage partners in many Dravidian systems.

Answer

Only siblings

Answer

No cousins

Answer

All cousins same

Question 4

Which of the following is a CORRECT statement about the transmission of healthcare-associated infections (HAIs)?

Accepted Answer

D. Vector-borne transmission requires a living organism as an intermediary — Vector-borne transmission involves living organisms like mosquitoes or ticks as intermediaries. Direct contact transmission does not require an intermediate object (Option A is incorrect); droplet transmission typically travels less than 1 meter (Option B is incorrect); airborne transmission involves particles smaller than 5 micrometers (Option C is incorrect).

Answer

A. Direct contact transmission requires a contaminated intermediate object

Answer

B. Droplet transmission can travel more than 1 meter from the source patient

Answer

C. Airborne transmission involves particles larger than 5 micrometers

Question 5

Dolly (cloned sheep) born:‌​‍

Accepted Answer

1996 — First cloned mammal, 1996 (announced 1997).‌​‍

Answer

1990

Answer

2000

Answer

2005

Question 6

The 'King of Spices' is:‌​‍

Accepted Answer

Pepper — Pepper = King of Spices. Cardamom = Queen of Spices.‌​‍

Answer

Cardamom

Answer

Cinnamon

Answer

Clove

Question 7

Algae characteristic: store food as:‌​‍

Accepted Answer

Starch, oils — Green algae (Chlorophyceae) — starch. ‌​‍Brown (Phaeophyceae) — laminarin. Red (Rhodophyceae) — floridean starch.

Answer

Lipids only

Answer

Protein

Answer

Glycogen only

Question 8

Damage to which part of the brain would most likely result in a patient having difficulty with balance, coordination, and fine motor skills?

Accepted Answer

C. Cerebellum — The cerebellum is primarily responsible for coordinating voluntary movements, maintaining posture, balance, and motor learning. Damage to the medulla oblongata would affect vital functions like breathing and heart rate, the thalamus acts as a relay station for sensory information, and the hypothalamus controls various homeostatic functions and hormone release.

Answer

A. Medulla oblongata

Answer

B. Thalamus

Answer

D. Hypothalamus

Question 9

African Union joined G20 in:‌​‍

Accepted Answer

2023 — Admitted as permanent member at Delhi Summit 2023.‌​‍

Answer

2024

Answer

2022

Answer

2025

Question 10

HIV infects:

Accepted Answer

Helper T (CD4+) lymphocytes — Retrovirus (RNA). Causes AIDS. Reverse transcriptase makes DNA from RNA. ART: combination of drugs.

Answer

RBC

Answer

Nerve

Answer

Muscle

DCOA Mixed Practice Test #646