DCOA Mixed Practice Test #746

Question 1

A postpartum mother at 6 weeks requests contraception. She is breastfeeding exclusively and her menses have not returned. Which of the following is the MOST appropriate contraceptive method for her?

Accepted Answer

B. Progestin-only pill (POP) — The progestin-only pill (POP) is the safest contraceptive choice for a breastfeeding mother, as it does not affect milk production or infant growth. COCP is contraindicated due to estrogen's impact on lactation. Cu-IUD and DMPA are effective but may cause irregular bleeding, making POP preferable in the early postpartum period. Lactational amenorrhea alone is unreliable after 6 weeks postpartum.

Answer

A. Combined oral contraceptive pill (COCP)

Answer

C. Copper intrauterine device (Cu-IUD)

Answer

D. Depot medroxyprogesterone acetate (DMPA) injection

Question 2

Defects of eye: myopia is:‌​‍

Accepted Answer

Near-sightedness, corrected by concave (-ve) lens — Image forms in front of retina. ‌​‍Hypermetropia: far-sight, needs convex lens. Presbyopia: age-related, bifocal.

Answer

Astigmatism

Answer

Far-sightedness

Answer

Cataract

Question 3

Why is the stereochemistry of a drug molecule often critical for its pharmacological activity?

Accepted Answer

C. Receptors are often stereoselective, interacting specifically with one enantiomer — Biological systems, including drug receptors, enzymes, and transport proteins, are chiral. This means they often exhibit stereoselectivity, interacting preferentially or exclusively with one specific enantiomer of a chiral drug. This can lead to significant differences in potency, efficacy, metabolism, and even adverse effects between stereoisomers. While other options may be true statements about stereoisomers, they are not the primary reason for differential pharmacological activity.

Answer

A. Stereoisomers have different melting points, affecting solubility

Answer

B. Different stereoisomers rotate plane-polarized light in different directions

Answer

D. Stereoisomers have different solubilities in water, affecting absorption

Question 4

India's first Armed Forces Day:‌​‍

Accepted Answer

Jan 15 (Army Day) — Army Day 15 Jan.‌​‍

Answer

15 Aug

Answer

26 Jan

Answer

None common

Question 5

Meiosis produces:

Accepted Answer

4 haploid cells with recombination — Meiosis reduces chromosome number by half; produces gametes (egg, sperm).

Answer

Identical diploid cells

Answer

Just 1 cell

Answer

Somatic cells

Question 6

IST is ___ hours ahead of GMT:‌​‍

Accepted Answer

5:30 — IST based on 82°30'E (Mirzapur near Allahabad). ‌​‍India single time zone — controversial in NE.

Answer

4:30

Answer

5

Answer

6

Question 7

Vitamin C deficiency causes which disease?‌​‍

Accepted Answer

Scurvy — Scurvy is caused by Vitamin C (Ascorbic acid) deficiency. ‌​‍Symptoms include bleeding gums, weakness, and joint pain. Rich sources: citrus fruits, amla.

Answer

Rickets

Answer

Beriberi

Answer

Night blindness

Question 8

Hepatic portal vein carries blood from:

Accepted Answer

Digestive organs to liver — Unique system between two capillary beds. Nutrients processed by liver before reaching systemic circulation.

Answer

Lungs to heart

Answer

Liver to heart

Answer

Kidney to heart

Question 9

The primary function of the epiglottis during swallowing is to:

Accepted Answer

B. Prevent food from entering the trachea. — The epiglottis is a flap of cartilage located at the root of the tongue that closes over the opening of the larynx (trachea) during swallowing, preventing food and liquids from entering the respiratory tract. It does not primarily direct food into the esophagus (that's the pharynx's role), initiate the gag reflex, or facilitate air passage during swallowing.

Answer

A. Direct food into the esophagus.

Answer

C. Initiate the gag reflex.

Answer

D. Facilitate air passage into the larynx.

Question 10

The smell added to LPG for leak detection is:‌​‍

Accepted Answer

Ethyl mercaptan — Ethyl mercaptan (a foul-smelling compound) is added to odourless LPG so leaks can be detected.‌​‍

Answer

Hydrogen sulphide

Answer

Ammonia

Answer

Chlorine

DCOA Mixed Practice Test #746