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Q. No.In a DNA strand the nucleotides are linked together by:
1. glycosidic bonds
2. phosphodiester bonds
3. peptide bonds
4. hydrogen bonds
1. glycosidic bonds
2. phosphodiester bonds
3. peptide bonds
4. hydrogen bonds
Subtopic: The DNA |
79%
Level 2: 60%+
Hints
A nucleoside differs from a nucleotide. It lacks the:
1. base
2. sugar
3. phosphate group
4. hydroxyl group
1. base
2. sugar
3. phosphate group
4. hydroxyl group
Subtopic: The DNA |
90%
Level 1: 80%+
Hints
Both deoxyribose and ribose belong to a class of sugars called:
1. trioses
2. hexoses
3. pentoses
4. polysaccharides
1. trioses
2. hexoses
3. pentoses
4. polysaccharides
Subtopic: The DNA |
82%
Level 1: 80%+
Hints
The fact that a purine base always pairs through hydrogen bonds with a pyrimidine base in the DNA double helix leads to:
1. the antiparallel nature
2. the semiconservative nature
3. uniform width throughout DNA
4. uniform length in all DNA
1. the antiparallel nature
2. the semiconservative nature
3. uniform width throughout DNA
4. uniform length in all DNA
Subtopic: DNA Double Helix |
57%
Level 3: 35%-60%
Hints
The net electric charge on DNA and histones is:
1. both positive
2. both negative
3. negative and positive, respectively
4. zero
1. both positive
2. both negative
3. negative and positive, respectively
4. zero
Subtopic: DNA Packaging |
74%
Level 2: 60%+
Hints
The promoter site and the terminator site for transcription are located at:
| 1. | 3' (downstream) end and 5' (upstream) end, respectively of the transcription unit |
| 2. | 5' (upstream) end and 3' (downstream) end, respectively of the transcription unit |
| 3. | the 5' (upstream) end |
| 4. | the 3' (downstream) end |
Subtopic: Transcription |
82%
Level 1: 80%+
Hints
Which of the following is true with respect to AUG?
1. It codes for methionine only
2. It is an initiation codon
3. It codes for methionine in both prokaryotes and eukaryotes
4. All of the above
1. It codes for methionine only
2. It is an initiation codon
3. It codes for methionine in both prokaryotes and eukaryotes
4. All of the above
Subtopic: Genetic Code |
90%
Level 1: 80%+
Hints
Subtopic: DNA vs RNA as Genetic Material |
89%
Level 1: 80%+
Hints
With regard to mature mRNA in eukaryotes:
| 1. | exons and introns do not appear in the mature RNA |
| 2. | exons appear but introns do not appear in the mature RNA |
| 3. | introns appear but exons do not appear in the mature RNA |
| 4. | both exons and introns appear in the mature RNA |
Subtopic: Transcription |
85%
Level 1: 80%+
Hints
The human chromosome with the highest and least number of genes in them are respectively:
1. Chromosome 21 and Y
2. Chromosome 1 and X
3. Chromosome 1 and Y
4. Chromosome X and Y
1. Chromosome 21 and Y
2. Chromosome 1 and X
3. Chromosome 1 and Y
4. Chromosome X and Y
Subtopic: Human Genome Project |
77%
Level 2: 60%+
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