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Biochemistry
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DNA Structure and Replication
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Question
The 5' and 3' numbers are related to the
Options
A. length of the DNA strand
B. carbon number in sugar
C. the number of phosphates
D. the base pair rule
Correct Answer
carbon number in sugar
More questions
1. In the study of one experiment it was found that the value of Tm for DNA is = 40° C. If the cell has 20% GC at the above Tm, then what will be value of 'Tm' if the GC% increases to 60%?
Options
A. Remains same
B. Increases
C. Decreases
D. Can not be compared
Show Answer
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Correct Answer: Increases
2. The primary reason for AIDS, a deadly disease is that it
Options
A. is caused by a virus
B. is caused by a bacterium
C. destroys key components of the body's internal defense system
D. causes a breakdown of the body's inflammatory response
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Correct Answer: destroys key components of the body's internal defense system
3. What is the main damaging effect of UV radiation on DNA?
Options
A. Depurination
B. Formation of thymine dimers
C. Single strand break
D. Dehydration
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Correct Answer: Formation of thymine dimers
4. Which of the following is required as a component of blood hemoglobin?
Options
A. Iron
B. Magnesium
C. Calcium
D. Copper
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Correct Answer: Iron
5. Translation in prokaryotes begins by the formation of a 30S initiation complex between the
Options
A. 30S ribosomal subunit, mRNA, initiation factors and N-fMet tRNA
B. 30S ribosomal subunit, tRNA and initiation factors
C. 30S ribosomal subunit and mRNA only
D. 30S ribosomal subunit, mRNA and initiation factors
Show Answer
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Correct Answer: 30S ribosomal subunit, mRNA, initiation factors and N-fMet tRNA
6. What is the approximate percentage of repetitive DNA sequences in human DNA?
Options
A. 10 to 20%
B. 20 to 30%
C. 30 to 40%
D. 40 to 50%
Show Answer
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Correct Answer: 20 to 30%
7. In eukaryotes fatty acid breakdown occurs in
Options
A. mitochondrial matrix
B. cytosol
C. cell membrane
D. endoplasmic reticulum
Show Answer
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Correct Answer: mitochondrial matrix
8. A deficiency of niacin causes
Options
A. pellagra
B. scurvy
C. cataract
D. anemia
Show Answer
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Correct Answer: pellagra
9. An intermediate which inhibits the activity of fructose 1,6 diphos-phatase would inhibit
Options
A. glycolysis
B. pyrolysis
C. gluconeogenesis
D. none of these
Show Answer
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Correct Answer: gluconeogenesis
10. The lac operon is transcribed in which segments?
Options
A. 1
B. 2
C. 3
D. 4
Show Answer
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Discuss
Correct Answer: 1
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More in Biochemistry:
Allosteric Effects
Amino Acid Metabolism
Anti Bodies
Antigen
ATP Synthesis and Fatty Acid Oxidation
Carbohydrate
Cell Signalling and Transduction
Cell Structure and Compartments
Chromatography
Disease Associated with Immune System
DNA Structure and Replication
Enzymes
FT IR Spectroscopy
Gas Chromatography
Gel Electrophoresis
Genetic Code and Regulation
Genetic Regulation Prokaryotes
Glycolysis
HPLC
Immune Response
Immune System
Immunological Techniques
Lipid
Membrane Structure and Functions
Minerals
Nitrogen Metabolism
NMR Spectroscopy
Nucleic Acids
Oxidative Phosphorylation
Photosynthesis and Respiration
Polymerase Chain Reaction
Protein and Nucleic Acid Interactions
Protein Purification
Protein Stability
Protein Structure
Protein Synthesis
Recombinant DNA Technology
RNA Structure
Spectroscopy
Structure and Properties of Amino Acids
Structure and Properties of Peptides
TCA Cycle
Thermodynamics and Free Energy
Transcription and Regulation
UV Luminance Spectroscopy
Vitamins and Coenzymes
Water, pH and Macromolecules