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NEET Biology 2021 PYQs

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100 questions in NEET 2021
Question 81 of 100
🟢 NEET 2021 📘 CLASS XII 🌿 Biotechnology Principles And Processes
During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first?
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Question 82 of 100
🟢 NEET 2021 📘 CLASS XII 🌿 Biotechnology Principles And Processes
A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is:
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Question 83 of 100
🟢 NEET 2021 📘 CLASS XII 🌿 Biotechnology And Its Applications
With regard to insulin choose correct options.
A. C-peptide is not present in mature insulin.
B. The insulin produced by rDNA technology has C-peptide.
C. The pro-insulin has C-peptide.
D. A-peptide and B-peptide of insulin are interconnected by disulphide bridges.
Choose the correct answer from the options given below.
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Question 84 of 100
🟢 NEET 2021 📘 CLASS XII 🌿 Biotechnology And Its Applications
For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?
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Question 85 of 100
🟢 NEET 2021 📘 CLASS XII 🌿 Environmental Issues
Dobson units are used to measure thickness of:
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Question 86 of 100
🟢 NEET 2021 📘 CLASS XI 🌿 Structural Organisation In Animals
Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.
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Question 87 of 100
🟢 NEET 2021 📘 CLASS XI 🌿 Structural Organisation In Animals
Following are the statements about prostomium of earthworm.
A. It serves as a covering for mouth.
B. It helps to open cracks in the soil into which it can crawl.
C. It is one of the sensory structures.
D. It is the first body segment.
Choose the correct answer from the options given below.
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Question 88 of 100
🟢 NEET 2021 📘 CLASS XI 🌿 Biomolecules
Following are the statements with reference to 'lipids'.
A. Lipids having only single bonds are called unsaturated fatty acids.
B. Lecithin is a phospholipid.
C. Trihydroxy propane is glycerol.
D. Palmitic acid has 20 carbon atoms including carboxyl carbon.
E. Arachidonic acid has 16 carbon atoms.
Choose the correct answer from the options given below.
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Question 89 of 100
🟢 NEET 2021 📘 CLASS XI 🌿 Locomotion And Movement
During muscular contraction which of the following events occur?
A. 'H' zone disappears
B. 'A' band widens
C. 'I' band reduces in width
D. Myosine hydrolyzes ATP, releasing the ADP and Pi
E. Z-lines attached to actins are pulled inwards
Choose the correct answer from the options given below.
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Question 90 of 100
🟢 NEET 2021 📘 CLASS XI 🌿 Locomotion And Movement
Match List-I with List-II.
List-I List-II
(A)Scapula (I)Cartilaginous joints
(B)Cranium (II)Flat bone
(C)Sternum (III)Fibrous joints
(D)Vertebral column (IV)Triangular flat bone
Choose the correct answer from the options given below:
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