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Q. No.Match List I with List II:
Choose the correct answer from the options given below:
1. A-IV, B-III, C- II, D- I
2. A-III, B-I, C- IV, D- II
3. A-II, B-III, C- IV, D- I
4. A-III, B-IV, C- I, D- II
| List I | List II | ||
| A. | Histones | I. | Loosely packed chromatin |
| B. | Nucleosome | II. | Densely packed chromatin |
| C. | Euchromatin | III. | Positively charged basic proteins |
| D. | Heterochromatin | IV. | DNA wrapped around histone octamer |
Choose the correct answer from the options given below:
1. A-IV, B-III, C- II, D- I
2. A-III, B-I, C- IV, D- II
3. A-II, B-III, C- IV, D- I
4. A-III, B-IV, C- I, D- II
Subtopic: DNA Packaging |
90%
Level 1: 80%+
NEET - 2024
Hints
Which of the following technique was used to elucidate the double helix model of DNA?
1. \(\gamma\)-radiation
2. Electromagnetic radiation
3. UV-Vis spectroscopy
4. X-ray diffraction
1. \(\gamma\)-radiation
2. Electromagnetic radiation
3. UV-Vis spectroscopy
4. X-ray diffraction
Subtopic: DNA Double Helix |
86%
Level 1: 80%+
NEET - 2024
Hints
Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. |
| Statement II: | In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. |
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: DNA Packaging |
76%
Level 2: 60%+
NEET - 2023
Hints
Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (a) | Bacteriophage \(\phi \times 174\) | (i) | 48502 base pairs |
| (b) | Bacteriophage lambda | (ii) | 5386 nucleotides |
| (c) | Escherichia coli | (iii) | 3.3 × 109 base pairs |
| (d) | Haploid content human DNA | (iv) | 4.6 × 106 base pairs |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (ii) | (iv) | (i) | (iii) |
| 3. | (ii) | (i) | (iv) | (iii) |
| 4. | (i) | (ii) | (iv) | (iii) |
Subtopic: The DNA |
83%
Level 1: 80%+
NEET - 2022
Hints
With respect to nucleosome, which of the following statements is incorrect ?
| 1. | Nucleosome contains 120 bp of DNA helix. |
| 2. | Nucleosomes are seen as 'beads' on string' under Electron Microscope. |
| 3. | DNA is wrapped around positively charged histone octamer to form nucleosome. |
| 4. | Nucleosome is the repeating unit of chromatin. |
Subtopic: DNA Packaging |
87%
Level 1: 80%+
NEET - 2022
Hints
One of the strands of double stranded DNA has base composition as follows: 15% A, 15% T, 40%G and 30%C. What will be the percentage of these bases in the complementary strand ?
1. 15% A, 15% T, 30% G , 40% C
2. 15% A, 30% T, 40% G , 15% C
3. 15% A, 15% T, 40% G , 30% C
4. 15% A, 40% T, 15% G , 30% C
Subtopic: DNA Double Helix |
62%
Level 2: 60%+
NEET - 2022
Hints
If a DNA molecule is shortened by 25 base pairs, how many helical turns will be reduced from its structure?
| 1. | 1 | 2. | 3 |
| 3. | 2.5 | 4. | 2 |
Subtopic: DNA Double Helix |
85%
Level 1: 80%+
NEET - 2022
Hints
Read the following statements and choose the set of correct statements:
Choose the correct answer from the options given below:
| (a) | Euchromatin is loosely packed chromatin. |
| (b) | Heterochromatin is transcriptionally active. |
| (c) | Histone octomer is wrapped by negatively charged DNA in nucleosome. |
| (d) | Histones are rich in lysine and arginine. |
| (e) | A typical nucleosome contains 400 bp of DNA helix. |
| 1. | (a), (c), (e) only | 2. | (b), (d), (e) only |
| 3. | (a), (c), (d) only | 4. | (b), (e) only |
Subtopic: DNA Double Helix | DNA Packaging |
90%
Level 1: 80%+
NEET - 2022
Hints
If the length of a DNA molecules is 1.1 metres, what will be the approximate number of base pairs?
1.\(6.6 \times 10^{6} \mathrm{bp}\)
2. \(3.3 \times 10^{9} \mathrm{bp}\)
3. \(6.6 \times 10^{9} \mathrm{bp}\)
4. \(3.3 \times 10^{6} \mathrm{bp}\)
1.\(6.6 \times 10^{6} \mathrm{bp}\)
2. \(3.3 \times 10^{9} \mathrm{bp}\)
3. \(6.6 \times 10^{9} \mathrm{bp}\)
4. \(3.3 \times 10^{6} \mathrm{bp}\)
Subtopic: The DNA |
77%
Level 2: 60%+
NEET - 2022
Hints
Complete the flow chart on central dogma
| 1. | (a) - Replication; (b) - Transcription; (c) - Translation; (d) - Protein |
| 2. | (a) - Transduction; (b) - Translation; (c) - Replication; (d) - Protein |
| 3. | (a) - Replication; (b) - Transcription; (c) - Transduction; (d) - Protein |
| 4. | (a) - Transcription; (b) - Replication; (c) - Transcription; (d) - Transduction |
Subtopic: DNA Double Helix |
92%
Level 1: 80%+
NEET - 2021
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