DCOA Mixed Practice Test #821

Question 1

The LM (50 Millesimal) potencies are known for their unique preparation and administration. What is the dilution factor at each step in the preparation of an LM potency?

Accepted Answer

C. 1:50,000 (Millesimal scale). — LM (50 Millesimal) potencies are prepared by a distinct method where one part of the previous potency is diluted with 50,000 parts of the vehicle (often a mixture of alcohol and water) at each successive step. This results in an extremely high dilution factor, distinguishing them from decimal (1:10) or centesimal (1:100) scales.

Answer

A. 1:100 (Centesimal scale).

Answer

B. 1:500 (Intermediate between X and C).

Answer

D. 1:1,000 (Thousand-fold dilution).

Question 2

The mechanism of action of statins (e.g., atorvastatin) involves competitive inhibition of which key enzyme in cholesterol biosynthesis?

Accepted Answer

A. HMG-CoA reductase — Statins are competitive inhibitors of HMG-CoA reductase, which is the rate-limiting enzyme in the mevalonate pathway responsible for endogenous cholesterol synthesis in the liver. Inhibiting this enzyme reduces cholesterol production. The other enzymes listed are involved in later steps of cholesterol synthesis or cholesterol esterification.

Answer

B. Squalene synthase

Answer

C. Lanosterol demethylase

Answer

D. Acyl-CoA:cholesterol acyltransferase (ACAT)

Question 3

What is the primary role of a teacher in a Communicative Language Teaching (CLT) classroom?

Accepted Answer

B. To act as a facilitator, creating opportunities for meaningful interaction. — In CLT, the teacher's role shifts from a traditional authority figure to a facilitator or guide, encouraging students to use the language for real communication. Options A and D are characteristic of the Grammar-Translation or Audio-lingual methods, while option C represents an approach that might hinder fluency development in CLT.

Answer

A. To present grammatical rules explicitly and drill them.

Answer

C. To correct every grammatical error immediately and directly.

Answer

D. To translate new vocabulary and complex sentences into the students' native language.

Question 4

R.K. Narayan's fictional town:‌​‍

Accepted Answer

Malgudi — South Indian town. ‌​‍'Malgudi Days', 'Swami and Friends', 'The Guide' (Sahitya Akademi 1960).

Answer

Mumbai

Answer

Chennai

Answer

Madurai

Question 5

The Attingal Revolt of 1721 is notable as:

Accepted Answer

The first organised popular uprising against the British in India — The 1721 Attingal Revolt saw locals attack and kill a 140-strong British contingent led by Gifford.

Answer

The first tribal revolt in Kerala

Answer

The first sepoy mutiny

Answer

A revolt against the Portuguese

Question 6

Vistara end:‌​‍

Accepted Answer

Merged into Air India Nov 2024 — Merged with Air India.‌​‍

Answer

Separate

Answer

Still flying

Answer

Closed

Question 7

Nuclear family is:

Accepted Answer

Parents + unmarried children — Trend in urban India. Reasons: migration, housing cost, women's work. Traditional joint family still in rural areas.

Answer

Joint

Answer

Only parents

Answer

Only children

Question 8

Hydrogen bonding occurs when H is bonded to which highly electronegative atoms?

Accepted Answer

F, O, N — H bonded to F/O/N shows strong H-bonding (explains water's high b.p.).

Answer

C, Si, P

Answer

Cl, Br, I

Answer

Na, K, Mg

Question 9

Which of the following are the main iron ore belts in India?‌​‍

Accepted Answer

Odisha, Jharkhand, Chhattisgarh, Goa, Karnataka — Hematite and magnetite. Bailadila (Chhattisgarh) largest. Singhbhum (Jharkhand), Keonjhar (Odisha), Bellary-Hospet.

Answer

Only Kerala

Answer

UP

Answer

Rajasthan

Question 10

A 28-year-old multiparous woman, who is breastfeeding exclusively, expresses interest in long-term contraception. She wants a method that is highly effective and does not require daily attention. Which method would be most suitable for her at this time?

Accepted Answer

B. Intrauterine Device (IUD) — For a breastfeeding woman seeking long-term, highly effective contraception without daily attention, an Intrauterine Device (IUD) like the Copper-T is an excellent choice. It is safe for breastfeeding mothers as it does not affect milk supply. Combined Oral Contraceptive Pills and vaginal rings contain estrogen, which can reduce milk production. While Depo-Provera is a progestin-only method suitable for breastfeeding, an IUD offers longer-term effectiveness without repeated injections.

Answer

A. Combined Oral Contraceptive Pills (COCs)

Answer

C. Contraceptive Vaginal Ring

Answer

D. Depo-Provera (DMPA) injection

DCOA Mixed Practice Test #821