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Q. No.Subtopic: DNA Double Helix |
91%
From NCERT
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In eukaryotes, rRNAs are transcribed by
1. RNA polymerase I and III
2. RNA polymerase III only
3. RNA polymerase I and II
4. RNA polymerase I only
1. RNA polymerase I and III
2. RNA polymerase III only
3. RNA polymerase I and II
4. RNA polymerase I only
Subtopic: Transcription |
From NCERT
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Match the following columns and select the correct option
1. a(i), b(ii), c(iii), d(iv)
| Column I (Genes of lac operon) |
Column II (Function) |
||
| a. | Operator gene | (i) | Interacts with repressor protein |
| b. | Promoter gene | (ii) | Transcribes mRNA for polypeptide synthesis |
| c. | Structural gene | (iii) | Provides attachment site for RNA polymerase |
| d. | Regulator gene | (iv) | Controls the activity of operator gene |
1. a(i), b(ii), c(iii), d(iv)
2. a(iv), b(iii), c(ii), d(i)
3. a(i), b(iii), c(ii), d(iv)
4. a(iv), b(ii), c(iii), d(i)
Subtopic: Gene Regulation: Lac Operon |
68%
From NCERT
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Which of the following RNA is a carrier that delivers the correct amino acid for protein synthesis?
1. mRNA
2. rRNA
3. hnRNA
4. tRNA
1. mRNA
2. rRNA
3. hnRNA
4. tRNA
Subtopic: Translation |
69%
From NCERT
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Select the incorrect match(es) from the following
1. a, b and c
2. a and d
3. d only
4. b and c only
| a. | Minisatellites | - | 0.1 to 20 bp |
| b. | SNPs | - | Due to single base DNA differences |
| c. | Frederick Sanger | - | Developed method to determine amino acid sequence in proteins |
| d. | VNTR | - | Does not show polymorphism |
2. a and d
3. d only
4. b and c only
Subtopic: DNA Fingerprinting |
50%
From NCERT
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All the termination codons of universal genetic codes begin with a nucleotide, that is
1. Adenine
2. Cytosine
3. Uracil
4. Thymine
1. Adenine
2. Cytosine
3. Uracil
4. Thymine
Subtopic: Genetic Code |
66%
From NCERT
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N-glycosidic linkages in a polynucleotide chain join
1. A nitrogenous base to a pentose sugar
2. A nucleotide to a ribose sugar
3. A nucleoside to a pentose sugar
4. A phosphate group to a nucleoside
1. A nitrogenous base to a pentose sugar
2. A nucleotide to a ribose sugar
3. A nucleoside to a pentose sugar
4. A phosphate group to a nucleoside
Subtopic: The DNA |
82%
From NCERT
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Read the following statements and choose the correct one (s).
A. During DNA replication, Adenine pairs with Uracil
B. Chargaff's rule is applicable only for double stranded DNA.
C. The area with long sequence of short repetitive DNA is called satellite DNA.
1. A and B
2. B and C
3. Only B
4. Only C
A. During DNA replication, Adenine pairs with Uracil
B. Chargaff's rule is applicable only for double stranded DNA.
C. The area with long sequence of short repetitive DNA is called satellite DNA.
1. A and B
2. B and C
3. Only B
4. Only C
Subtopic: The DNA | DNA Double Helix | DNA Fingerprinting |
63%
From NCERT
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The structures which appear as "beads on string" in chromatin under electron microscope have all of the following histone proteins, except
1. \(\mathrm{H}_2 \mathrm{~A}\)
2. \(\mathrm{H}_3\)
3. \(\mathrm{H}_2 \mathrm{~B}\)
4. \(\mathrm{H}_1\)
1. \(\mathrm{H}_2 \mathrm{~A}\)
2. \(\mathrm{H}_3\)
3. \(\mathrm{H}_2 \mathrm{~B}\)
4. \(\mathrm{H}_1\)
Subtopic: DNA Packaging |
82%
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Identify the incorrect difference between prokaryotic and eukaryotic transcription.
| Prokaryotic Transcription | Eukaryotic Transcription | |
| 1. | Splicing is generally not required | Splicing is required |
| 2. | There is only one type of RNA polymerase | There are three types of RNA polymerase |
| 3. | Structural gene is polycistronic | Structural gene is monocistronic |
| 4. | Post transcriptional modification takes place in the cytoplasm | Post transcriptional modification takes place in the nucleolus |
Subtopic: Transcription |
68%
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