Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below?
1
Depressant
2
Stimulant
3
Pain-killer
4
Hallucinogen
Official Solution
Correct Option:
(4)
The correct option (D): Hallucinogen.
02
PYQ 2019
medium
biologyID: neet-ug-
Drug called 'Heroin' is synthesized by: (1) methylation of morphine (2) acetylation of morphine (3) glycosylation of morphine (4) nitration of morphine
1
methylation of morphine
2
acetylation of morphine
3
glycosylation of morphine
4
nitration of morphine
Official Solution
Correct Option:
(2)
The question asks how the drug 'Heroin' is synthesized. The options provided are different chemical processes involving morphine.
Let's analyze each option:
Methylation of morphine: This process involves the addition of a methyl group to morphine. However, Heroin is not synthesized through this process.
Acetylation of morphine: Heroin, also known as diacetylmorphine, is synthesized by the acetylation of morphine. In this chemical reaction, two acetyl groups are attached to morphine, modifying its molecular structure and enhancing its potency. This is the correct method for synthesizing Heroin.
Glycosylation of morphine: Glycosylation involves the attachment of a sugar molecule, which is unrelated to Heroin's synthesis.
Nitration of morphine: Nitration involves adding a nitro group. This process is not used in the production of Heroin.
Thus, the correct answer is the acetylation of morphine. This process transforms morphine into Heroin by introducing acetyl groups, resulting in increased lipid solubility and rapid action in the central nervous system, which accounts for Heroin's potent effects.
03
PYQ 2024
medium
biologyID: neet-ug-
Which of the following is not a natural/traditional contraceptive method?
1
Coitus interruptus
2
Periodic abstinence
3
Lactational amenorrhea
4
Vaults
Official Solution
Correct Option:
(4)
In the context of contraception, natural or traditional methods are those that do not involve the use of medical or chemical devices but rely on behavioral or physiological cues. Let's examine each option to identify which is not a natural method:
Coitus interruptus: Also known as the withdrawal method, where the male partner withdraws before ejaculation to prevent sperm from entering the female reproductive tract. This is considered a natural method.
Periodic abstinence: Involves avoiding intercourse during the woman's fertile period. This is known as the rhythm method and is a natural method.
Lactational amenorrhea: The natural postnatal infertility that occurs when a woman is breastfeeding. This is a natural method of contraception.
Vaults: These are physical barrier devices inserted into the vagina to prevent sperm from entering the uterus. This method uses a device, making it not a natural contraceptive method.
Based on the analysis, Vaults is not a natural/traditional contraceptive method. This method involves the use of a device, distinguishing it from the other options which rely on natural cues or behaviors.
About Drugs - NEET-UG
Drugs is a vital chapter for NEET-UG aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Drugs PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Drugs carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
