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Discussion
Home
‣
Biochemistry
‣
Vitamins and Coenzymes
See What Others Are Saying!
Question
Which of these hormones is a catecholamine?
Options
A. Follitropin
B. Norepinephrine
C. Tetraiodothyronine
D. Tetrahydrofolate
Correct Answer
Norepinephrine
More questions
1. Nucleoside is a pyrimidine or purine base
Options
A. covalently bonded to a sugar
B. ionically bonded to a sugar
C. hydrogen bonded to a sugar
D. none of the above
Show Answer
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Discuss
Correct Answer: covalently bonded to a sugar
2. Specialized transduction occurs when
Options
A. the bacteriophage incorporates randomly in the bacterial chromosome
B. the bacteriophage never incorporates into the bacterial chromosome
C. the bacteriophage always incorporates at the same position in the bacterial chromosome
D. none of the above
Show Answer
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Discuss
Correct Answer: the bacteriophage always incorporates at the same position in the bacterial chromosome
3. Polyprotic acids such as H
3
PO
4
, can act as acid-base buffers
Options
A. only in combination with polyprotic bases
B. if their concentration is kept low
C. at pH values around neutrality
D. at pH values around any of their
pK
a
's
Show Answer
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Discuss
Correct Answer: at pH values around any of their
pK
a
's
4. Stereo chemical configuration of all a-amino acids derived from proteins is
Options
A. L
B. D
C. L and D
D. None of these
Show Answer
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Discuss
Correct Answer: L
5. Bacterial protein called catabolic activator protein (CAP) is an example of
Options
A. negative control of gene expression
B. positive control of gene expression
C. second type of positive control of gene expression
D. none of the above
Show Answer
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Discuss
Correct Answer: second type of positive control of gene expression
6. A mutation in the tip binding site of the repressor would result in
Options
A. constitutive trp operon expression
B. inducible trp operon expression
C. no operon expression
D. none of the above
Show Answer
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Discuss
Correct Answer: constitutive trp operon expression
7. PCR is an abbreviation for
Options
A. Protein Change Reaction
B. Polymerase Chain Reaction
C. Positive Charge Reaction:
D. Preliminary Change Rate
Show Answer
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Discuss
Correct Answer: Polymerase Chain Reaction
8. According to the fluid mosaic model of cell membranes,
Options
A. the most common type of molecules in the membrane are proteins
B. basic membrane structure results from how the proteins interact with water
C. the membrane is a highly mobile mixture of phospholipids and proteins
D. the unique properties of cell types are determined by their phospholipids
Show Answer
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Discuss
Correct Answer: the membrane is a highly mobile mixture of phospholipids and proteins
9. Which of the following is correct?
Options
A. Membranes form boundaries around the cell and distinct subcellular components
B. Membranes act as selectively permeable barrier
C. Membranes contain varying amount of lipid and protein and some contain small amount of carbohydrates
D. All of the above
Show Answer
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Discuss
Correct Answer: All of the above
10. Cholesterol is essential for normal membrane functions because it
Options
A. plugs up the cardiac arteries of older men
B. cannot be made by higher organisms
C. keeps membranes fluid.
D. spans the thickness of the bilayer
Show Answer
Scratch Pad
Discuss
Correct Answer: keeps membranes fluid.
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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