DCOA Mixed Practice Test #768

Question 1

Calcitonin:‌​‍

Accepted Answer

Lowers blood Ca — Produced by thyroid C cells.‌​‍

Answer

No effect

Answer

Renal

Answer

Raises

Question 2

A newborn baby receives antibodies from its mother through the placenta and breast milk. This type of immunity provides immediate, but temporary, protection against various infections. What is this specific type of immunity called?

Accepted Answer

B. Passive natural immunity — Passive natural immunity occurs when antibodies are transferred naturally from one individual to another, such as from mother to child via the placenta (IgG) and breast milk (IgA). It provides immediate protection but is temporary as the recipient's immune system is not actively producing its own antibodies.

Answer

A. Active natural immunity

Answer

C. Active artificial immunity

Answer

D. Passive artificial immunity

Question 3

Food preservatives:‌​‍

Accepted Answer

NaCl (common), sodium benzoate, sorbic acid — Inhibit microbial growth. ‌​‍Class I (NaCl, sugar, vinegar) and Class II (chemical) preservatives.

Answer

Oxygen

Answer

Cellulose

Answer

Water only

Question 4

India's 2024 military exercise 'Yudh Abhyas':‌​‍

Accepted Answer

With USA — India-US annual exercise.‌​‍

Answer

With Japan

Answer

With UK

Answer

With Russia

Question 5

A teacher observes that a student struggles with understanding a concept despite multiple explanations. Which type of assessment should the teacher use to identify the root cause of the difficulty?

Accepted Answer

B. Diagnostic assessment — Diagnostic assessment is used to identify specific learning difficulties or gaps in understanding. It is conducted before or during instruction to help teachers adjust their methods. Summative assessment evaluates learning outcomes, formative assessment provides ongoing feedback, and aptitude assessment measures potential rather than current understanding.

Answer

A. Summative assessment

Answer

C. Formative assessment

Answer

D. Aptitude assessment

Question 6

Snell's law is:‌​‍

Accepted Answer

n₁ sin i = n₂ sin r — Snell's law of refraction: n₁ sin θ₁ = n₂ sin θ₂.‌​‍

Answer

sin i × sin r = constant

Answer

n₁ sin r = n₂ sin i

Answer

sin i + sin r = n

Question 7

Napoleon Bonaparte became Emperor of France in:‌​‍

Accepted Answer

1804 — Napoleon crowned himself Emperor in 1804 at Notre Dame. ‌​‍Coup of 18 Brumaire (1799) earlier established him as First Consul.

Answer

1799

Answer

1812

Answer

1815

Question 8

During a quiet reading session, Mr. Rajesh notices two students whispering and distracting others. Without interrupting the entire class, what is the most appropriate initial action Mr. Rajesh should take to address this minor disruption?

Accepted Answer

C. Walk closer to the students and make eye contact with them. — Using proximity control and eye contact is a highly effective non-verbal strategy for addressing minor misbehavior without disrupting the entire class. Public reprimands or addressing the whole class can be disruptive, while sending students to the principal's office is an overreaction for a first-instance minor infraction.

Answer

A. Publicly reprimand the students by calling out their names.

Answer

B. Ask the whole class to stop talking and remind them of the rules.

Answer

D. Send both students immediately to the principal's office.

Question 9

Aranmula Boat Race on:‌​‍

Accepted Answer

Pamba — On Pamba river during Onam.‌​‍

Answer

Periyar

Answer

Bharathapuzha

Answer

Vembanad

Question 10

When dealing with a student who is consistently off-task and disruptive despite repeated gentle reminders, what is the next appropriate step in a typical progressive discipline model?

Accepted Answer

D. Having a private conversation with the student to understand the root cause and discuss expectations. — A private conversation with the student is the next logical step in a progressive discipline model after gentle reminders, as it allows the teacher to understand underlying issues and collaboratively set expectations. Immediate severe punishment or public shaming are counterproductive and ignoring the behavior is ineffective.

Answer

A. Immediately sending the student to the principal's office for severe punishment.

Answer

B. Publicly shaming the student in front of their peers to deter future misbehavior.

Answer

C. Ignoring the behavior, hoping it will eventually stop on its own.

DCOA Mixed Practice Test #768