DCOA Mixed Practice Test #290

Question 1

Spice export hub:

Accepted Answer

Kerala — Kerala — pepper, cardamom, ginger.

Answer

AP

Answer

Karnataka

Answer

TN

Question 2

Phloem transports:

Accepted Answer

Food — Sugar and food.

Answer

Water

Answer

Both

Answer

Gases

Question 3

What was the real name of Vagbhatananda?‌​‍

Accepted Answer

K.P. Kunjikannan — Vagbhatananda's birth name was Kunjikannan Gurukkal.‌​‍

Answer

Keeleri Kunjikannan

Answer

Kunjan Pillai

Answer

Vayaleri Kunjikannan

Question 4

Which of the following statements regarding the stereochemistry of drugs is most accurate?

Accepted Answer

C. Stereoisomers can exhibit different pharmacokinetic profiles and pharmacodynamic effects. — Stereoisomers, especially enantiomers, can interact differently with chiral biological targets (receptors, enzymes), leading to different pharmacokinetic profiles (absorption, distribution, metabolism, excretion) and pharmacodynamic effects (activity, potency, side effects). Enantiomers do not always have identical activity; one enantiomer is often more active, or they might have different activities. Diastereomers are not mirror images and are not superimposable.

Answer

A. Enantiomers always have identical pharmacological activity and potency.

Answer

B. Only racemic mixtures are therapeutically active, never pure enantiomers.

Answer

D. Diastereomers are mirror images of each other and are superimposable.

Question 5

Ozone layer in:‌​‍

Accepted Answer

Stratosphere (15-35 km) — Absorbs UV-B/C. ‌​‍Depletion by CFCs. Montreal Protocol 1987. ‌​‍Antarctic ozone hole (Sept-Oct).

Answer

Thermosphere

Answer

Troposphere

Answer

Mesosphere

Question 6

In an English language classroom primarily employing the Audio-lingual Method, what would be the teacher's most prominent role during a typical lesson?

Accepted Answer

C. Modeling correct pronunciation and grammatical patterns for students to mimic and repeat. — The Audio-lingual Method emphasizes habit formation through repetition and mimicry. Therefore, the teacher's role is primarily to model and lead drills, ensuring students accurately reproduce language patterns. Options A and B describe roles more typical of CLT, while D is characteristic of the Grammar-Translation Method.

Answer

A. Acting as a facilitator, guiding students to discover language rules inductively.

Answer

B. Providing minimal input and encouraging students to generate original, creative texts.

Answer

D. Primarily focusing on explaining complex grammatical structures and vocabulary in the students' native language.

Question 7

The first Arab writer to call Kerala as 'Malabar' was:‌​‍

Accepted Answer

Sulaiman — Sulaiman the Merchant (9th century Arab traveller) referred to Kerala as Malabar.‌​‍

Answer

Niccolo Conti

Answer

Al-Biruni

Answer

Ibn Battuta

Question 8

Who proposed the neutrino hypothesis?‌​‍

Accepted Answer

Pauli (to conserve energy in β-decay) — 1930 'desperate remedy'. ‌​‍Named by Fermi. Detected 1956 (Cowan-Reines). ‌​‍Kajita-McDonald Nobel 2015 for neutrino oscillations.

Answer

Dirac

Answer

Heisenberg

Answer

Fermi

Question 9

Collagen in:‌​‍

Accepted Answer

Connective tissue, skin, bones — Most abundant protein in body.‌​‍

Answer

Liver

Answer

Brain

Answer

Blood only

Question 10

What was the original name of Jahangir's politically powerful wife, Noor Jahan?‌​‍

Accepted Answer

Mehrunissa — Nur Jahan (Mehrunissa) — widow of Sher Afghan, married Jahangir 1611. ‌​‍Coins issued in her name. Patroness of arts, politics.

Answer

Manmati

Answer

Ruqaiya

Answer

Arjumand Banu

DCOA Mixed Practice Test #290