Year-wise Biology practice

NEET (Oct)2020 Biology PYQs

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89 questions in this collection · Page 7 of 9

Question 61 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Molecular Basis Of Inheritance

In the polynucleotide chain of DNA, a nitrogenous base is linked to the –OH of:
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Question 62 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Molecular Basis Of Inheritance

The term 'Nuclein' for the genetic material was used by:
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Question 63 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Molecular Basis Of Inheritance

Identify the statement which is incorrect.

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Explanation:

Option 2 is incorrect. Glycine is an amino acid, not a lipid. NCERT classifies glycine as the simplest amino acid with a side chain of hydrogen. Lipids include fats, oils, and phospholipids like lecithin. Options 1, 3, and 4 are correct: sulfur is part of cysteine's thiol group; lecithin is a phospholipid containing phosphorus; tyrosine has an aromatic ring in its side chain.

🧠 Did You Know?

Some amino acids contain sulfur (cysteine and methionine), contributing to disulfide bonds and protein structure.

💡 NCERT Memory Line:

Amino acids are the building blocks of proteins; lipids include fats and phospholipids like lecithin, which contain phosphorus.

Question 64 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Molecular Basis Of Inheritance

Which is the basis of genetic mapping of human genome as well as DNA finger printing?
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Question 65 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Evolution

After about how many years of formation of earth, life appeared on this planet?
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Question 66 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Evolution

Embryological support for evolution was proposed by:
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Question 67 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Evolution

The phenomenon of evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
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Question 68 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Evolution

A Hominid fossil discovered in Java in 1891, now extinct, having cranial capacity of about 900 cc was:
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Question 69 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Human Health And Disease

Match the following columns and select the correct option:
Column-I Column-II
(I)Typhoid (A)Haemophilus influenzae
(II)Malaria (B)Wuchereria bancrofti
(III)Pneumonia (C)Plasmodium vivax
(IV)Filariasis (D)Salmonella typhi
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Question 70 of 89
🟢 NEET (Oct)2020 📘 CLASS XII

Human Health And Disease

The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. This type of immunity is called as:
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