NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test
NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test is an online chapter test in the NEET UG pattern, covering Biomolecules & Cell Chemistry. 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 |
|---|---|
| Biomolecules & Cell Chemistry | 20 |
Difficulty: 10 medium · 10 hard
Biomolecules MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. In the primary structure of a polypeptide, the amino acid that occupies the first position and carries a free amino group is referred to as the:
किसी पॉलीपेप्टाइड की प्राथमिक संरचना में, वह अमीनो अम्ल जो प्रथम स्थान पर स्थित होता है और एक मुक्त अमीनो समूह रखता है, क्या कहलाता है:
- A. C-terminal amino acid / C-सिरा अमीनो अम्ल
- B. Terminal zwitterion / सिरांत ज़्विटरआयन
- C. N-terminal amino acid / N-सिरा अमीनो अम्ल
- D. Prosthetic amino acid / प्रोस्थेटिक अमीनो अम्ल
Solution
The amino acid with the free –NH2 group at the start of the chain is the N-terminal (amino-terminal) residue; the one with the free –COOH group at the other end is the C-terminal residue.
शृंखला के प्रारंभ में मुक्त –NH2 समूह वाला अमीनो अम्ल N-सिरा (अमीनो-सिरा) अवशेष कहलाता है; दूसरे सिरे पर मुक्त –COOH समूह वाला C-सिरा अवशेष कहलाता है।
Q2. The backbone of a polynucleotide chain is formed by the repeated linkage, through phosphodiester bonds, of which two components?
पॉलीन्यूक्लियोटाइड शृंखला का मेरुदंड, फॉस्फोडाइएस्टर बंधों के माध्यम से किन दो घटकों के बारंबार जुड़ाव से बनता है?
- A. Nitrogenous base and pentose sugar / नाइट्रोजनी क्षार और पेन्टोज शर्करा
- B. Two adjacent nitrogenous bases / दो आसन्न नाइट्रोजनी क्षार
- C. Pentose sugar and phosphate / पेन्टोज शर्करा और फॉस्फेट
- D. Nitrogenous base and phosphate / नाइट्रोजनी क्षार और फॉस्फेट
Solution
The sugar–phosphate backbone is built by phosphodiester bonds joining the pentose sugar of one nucleotide to the phosphate of the next; the nitrogenous bases project from this backbone rather than forming it.
शर्करा–फॉस्फेट मेरुदंड फॉस्फोडाइएस्टर बंधों द्वारा बनता है जो एक न्यूक्लियोटाइड की पेन्टोज शर्करा को अगले के फॉस्फेट से जोड़ते हैं; नाइट्रोजनी क्षार इस मेरुदंड से बाहर की ओर निकले रहते हैं, उसका निर्माण नहीं करते।
Q3. Which one of the following nitrogenous bases differs from the other three in possessing a double-ringed (purine) structure?
निम्नलिखित में से कौन-सा एक नाइट्रोजनी क्षार द्वि-वलय (प्यूरीन) संरचना रखने के कारण अन्य तीन से भिन्न है?
- A. Cytosine / साइटोसीन
- B. Uracil / यूरेसिल
- C. Thymine / थाइमीन
- D. Adenine / एडिनीन
Solution
Adenine is a purine with a fused double-ring structure, whereas cytosine, uracil and thymine are pyrimidines having a single ring.
एडिनीन एक प्यूरीन है जिसमें संगलित द्वि-वलय संरचना होती है, जबकि साइटोसीन, यूरेसिल और थाइमीन एकल वलय वाले पिरिमिडीन हैं।
Frequently asked questions
How many questions are in the NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test cover?
Biomolecules & Cell Chemistry (20 questions).
Is the NEET UG Biomolecules & Cell Chemistry: Biomolecules – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
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