JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test
JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test is an online chapter test in the JEE Main pattern, covering Organic — Biomolecules & Practical. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Organic — Biomolecules & Practical | 20 |
Difficulty: 9 medium · 11 hard
Biomolecules MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. With respect to solubility, which one of the following vitamins is the odd one out?
विलेयता की दृष्टि से निम्नलिखित में से कौन-सा विटामिन शेष से भिन्न है?
- A. Vitamin D / विटामिन D
- B. Vitamin E / विटामिन E
- C. Vitamin A / विटामिन A
- D. Vitamin C / विटामिन C
Solution
Vitamins A, D and E are fat-soluble and are stored in the liver and adipose tissue, whereas vitamin C is water-soluble, is readily excreted in urine and must be supplied regularly in the diet.
विटामिन A, D और E वसा में विलेय होते हैं तथा यकृत और वसा ऊतकों में संचित रहते हैं, जबकि विटामिन C जल में विलेय है, मूत्र के साथ सरलता से उत्सर्जित हो जाता है और इसे आहार में नियमित रूप से लेना आवश्यक है।
Q2. The double-helix model of DNA, in which two antiparallel polynucleotide strands are held together by hydrogen bonds between complementary bases, was proposed in 1953 by:
DNA का द्वि-कुंडलिनी (डबल-हेलिक्स) मॉडल, जिसमें दो समांतर-विपरीत (ऐंटीपैरेलल) पॉलीन्यूक्लियोटाइड शृंखलाएँ पूरक क्षारकों के बीच हाइड्रोजन बंधों द्वारा एक साथ जुड़ी रहती हैं, 1953 में किसने प्रस्तावित किया था:
- A. Fischer and Kiliani / फिशर और किलियानी
- B. Haworth and Tollens / हावर्थ और टॉलेंस
- C. Watson and Crick / वाटसन और क्रिक
- D. Sanger and Edman / सैंगर और एडमैन
Solution
James Watson and Francis Crick proposed the double-helix structure of DNA in 1953.
जेम्स वाटसन और फ्रांसिस क्रिक ने 1953 में DNA की द्वि-कुंडलिनी संरचना प्रस्तावित की थी।
Q3. An aldohexose such as glucose contains four chiral carbon atoms. The total number of possible optical stereoisomers of an aldohexose is:
ग्लूकोज़ जैसे ऐल्डोहेक्सोज़ में चार काइरल कार्बन परमाणु होते हैं। एक ऐल्डोहेक्सोज़ के संभावित प्रकाशिक त्रिविम-समावयवियों (स्टीरियोआइसोमर) की कुल संख्या है:
- A. 16
- B. 4
- C. 8
- D. 32
Solution
With n = 4 asymmetric carbons, the number of stereoisomers is 2^4 = 16.
n = 4 असममित कार्बन के साथ, त्रिविम-समावयवियों की संख्या 2^4 = 16 होती है।
Frequently asked questions
How many questions are in the JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test cover?
Organic — Biomolecules & Practical (20 questions).
Is the JEE Main Organic — Biomolecules & Practical: Biomolecules – Chapter Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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