NEET UG Cell Biology: Cell: The Unit of Life – Chapter Test
NEET UG Cell Biology: Cell: The Unit of Life – Chapter Test is an online chapter test in the NEET UG pattern, covering Cell Biology. 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 |
|---|---|
| Cell Biology | 20 |
Difficulty: 10 medium · 10 hard
The Unit of Life MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. Which one of the following features is NOT characteristic of the plasma membrane as described by the fluid mosaic model?
निम्नलिखित में से कौन-सी एक विशेषता तरल मोज़ेक मॉडल द्वारा वर्णित प्लाज्मा झिल्ली की विशेषता नहीं है?
- A. Proteins form two continuous rigid layers covering both surfaces of the lipid bilayer / प्रोटीन लिपिड द्विपरत की दोनों सतहों को ढँकते हुए दो सतत कठोर परतें बनाते हैं
- B. Integral proteins are partially or totally buried in the membrane / समाकल (इंटीग्रल) प्रोटीन झिल्ली में आंशिक या पूर्णतः दबे होते हैं
- C. The quasi-fluid nature of the lipid permits lateral movement of proteins within the bilayer / लिपिड की अर्ध-तरल प्रकृति द्विपरत के भीतर प्रोटीनों की पार्श्व गति की अनुमति देती है
- D. The lipids are arranged as a bilayer with their polar heads directed outward / लिपिड अपने ध्रुवीय शीर्षों को बाहर की ओर निर्देशित करते हुए द्विपरत के रूप में व्यवस्थित होते हैं
Solution
In the fluid mosaic model the proteins are not arranged as a continuous rigid layer sandwiching the lipids; rather they are dispersed within and across a fluid lipid bilayer. The other three are correct features.
तरल मोज़ेक मॉडल में प्रोटीन, लिपिड को ढँकने वाली एक सतत कठोर परत के रूप में व्यवस्थित नहीं होते; बल्कि वे एक तरल लिपिड द्विपरत के भीतर और आर-पार बिखरे होते हैं। अन्य तीन सही विशेषताएँ हैं।
Q2. During active protein synthesis, several ribosomes may be found attached to a single strand of messenger RNA. Such a cluster of ribosomes is called a:
सक्रिय प्रोटीन संश्लेषण के दौरान, एकल संदेशवाहक RNA (mRNA) की एक लड़ी से कई राइबोसोम जुड़े हुए पाए जा सकते हैं। राइबोसोमों के ऐसे समूह को कहते हैं:
- A. Polysome / पॉलीसोम
- B. Dictyosome / डिक्टियोसोम
- C. Nucleosome / न्यूक्लिओसोम
- D. Lysosome / लाइसोसोम
Solution
A group of several ribosomes simultaneously translating one mRNA molecule is called a polysome (polyribosome).
एक ही mRNA अणु का एक साथ अनुवाद करने वाले कई राइबोसोमों के समूह को पॉलीसोम (पॉलीराइबोसोम) कहते हैं।
Q3. The primary cell wall of a growing plant cell is chemically composed mainly of:
वर्धनशील पादप कोशिका की प्राथमिक कोशिका भित्ति रासायनिक रूप से मुख्यतः किससे बनी होती है?
- A. Cellulose / सेलुलोज
- B. Chitin / काइटिन
- C. Lignin / लिग्निन
- D. Peptidoglycan / पेप्टिडोग्लाइकन
Solution
The plant cell wall is composed mainly of cellulose, along with hemicellulose, pectins and proteins. Chitin is found in fungal walls, peptidoglycan in bacterial walls, and lignin is deposited chiefly in secondary walls.
पादप कोशिका भित्ति मुख्यतः सेलुलोज से बनी होती है, साथ ही हेमीसेलुलोज, पेक्टिन तथा प्रोटीन से भी। काइटिन कवक की भित्ति में, पेप्टिडोग्लाइकन जीवाणु की भित्ति में पाया जाता है, तथा लिग्निन मुख्यतः द्वितीयक भित्ति में निक्षेपित होता है।
Frequently asked questions
How many questions are in the NEET UG Cell Biology: Cell: The Unit of Life – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Cell Biology: Cell: The Unit of Life – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Cell Biology: Cell: The Unit of Life – Chapter Test cover?
Cell Biology (20 questions).
Is the NEET UG Cell Biology: Cell: The Unit of Life – 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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