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Biochemistry
‣
Enzymes
See What Others Are Saying!
Question
Common feature in all serine proteases is a
Options
A. hydrophobic specificity pocket
B. hydrophilic specificity pocket
C. cluster of reactive serine residues
D. single reactive serine residue
Correct Answer
single reactive serine residue
More questions
1. Deoxyribonucleoside triphosphates, being need in the chain termination methods are
Options
A. dATP
B. dGTP and dCTP
C. dTTP
D. all of these
Show Answer
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Discuss
Correct Answer: all of these
2. When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .
Options
A. signaling molecule; receptor; G proteins
B. signaling molecule; target cell; G proteins
C. signaling molecule; target cell; receptors
D. kinase; receptor; proteases
Show Answer
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Discuss
Correct Answer: signaling molecule; target cell; receptors
3. In hemoglobin, allosteric effects occur
Options
A. only in humans
B. for maintaining Fe in the Fe
2+
state
C. to minimize oxygen delivery to the tissues
D. to maximize oxygen delivery to the tissues
Show Answer
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Discuss
Correct Answer: to maximize oxygen delivery to the tissues
4. Which of the following white blood cells act as scavengers when they engulf and digest pathogens?
Options
A. Macrophages
B. T cells
C. B cells
D. Lymphocytes
Show Answer
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Discuss
Correct Answer: Macrophages
5. An antigen preparation and an antibody preparation are tested by immunodiffusion. Three bands are found, indicating that
Options
A. there was more than one antigen
B. the antibody was impure
C. the temperature was too high
D. there was one antibody and one antigen
Show Answer
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Discuss
Correct Answer: there was more than one antigen
6. Each tRNA molecule has a cloverleaf secondary structure consisting of
Options
A. three stem loops
B. two stem loops
C. four stem loops
D. either (a) or (b)
Show Answer
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Discuss
Correct Answer: three stem loops
7. Which polymerase is active in DNA repairing
Options
A. Polymerase I
B. Polymerase II
C. Polymerase III
D. none of these
Show Answer
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Discuss
Correct Answer: Polymerase II
8. What type of B cell is like a tiny factory that produces antibodies identical to the B cell receptor that bind to the original antigen?
Options
A. T cells
B. Memory cells
C. Plasma cells
D. Macrophages
Show Answer
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Discuss
Correct Answer: Plasma cells
9. Each replication bubbles consists of
Options
A. 3 replication forks
B. 2 replication forks
C. 4 replication forks
D. 1 replication forks
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Correct Answer: 2 replication forks
10. Selenium is an essential component of the enzyme glutathione peroxidase which
Options
A. scavenges toxic hydoperoxycompounds in tissues
B. reduces toxic hydoperoxycompounds in tissues
C. oxidizes toxic hydoperoxycompounds in tissues
D. none of the above
Show Answer
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Discuss
Correct Answer: scavenges toxic hydoperoxycompounds in tissues
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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