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Quiz 45
Mdcat-past-papers - UHS Quiz
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Board: UHS |
881. Enzyme catalase protects the plants cell from:
Dehydration
Photorespiration
Toxic effect of alcohol
Protein loss metabolism
882. Pepsin, protein digesting enzyme sets best pH:
3
4.5
2
6
883. Which property of enzyme is helpful to carry out metabolic activities at room temperature?
Not sensitivity to pH
Does not change the speed of reaction
Highly specific
Required in large quantities
884. Optimum pH for pancreatic lipase is:
2
4
6
8
885. The term feedback refers to:
Enzymes remain unaffected
Product accelerates the production of enzymes
Enzyme is inhibited by product
both b & c are correct
886. In term of enzyme action, 'maximum temperature' refers to a temperature at which:
Enzymes starts to denature
Enzymes work best
Enzymes are reactivated
Enzymes start to denature
887. Non-competitive inhibitor molecules have:
A similar structure to the normal substrate molecule
A quite different structure from the substrate molecule
A different conformation but fit into the active site
A similar conformation but does not fit into the active site
888. Competitive inhibitors are:
Homologous to substrate
Analogous to substrate
Smaller than substrate
Larger than substrate
889. —reduces the enzyme productivity by blocking the substrate from entering into the active site due to similar shapes:
Competitive Inhibitors
Non-competitive inhibitors
Co-enzymes
Activators
890. Enzymatic activity can be inhibited by:
Heavy metal ions
Methane
Mutase
Noble gases
891. A competitive inhibitor.
Accelerates the chemical reaction
Binds to the enzyme
Is irreversible
Is reversible
892. Non competitive inhibitors react with enzyme at:
Allosteric site
Passive site
Active site
Regulatory site
893. In virus, a combined structure formed by core(nucleic acid) and capsid is:
Nucleocapsid
Prion
Envelope
Capsomeres
894. The complex, mature and infection virus is known as:
Venome
Genome
Virion
Capsid
895. Which of the following is 'Not related' to enveloped virus?
They survive for a short time.
Their envelope is sensitive to sunlight
they are tolerant to antibodies.
Envelope is derived from host.
896. Choose the organism which requires a single cellular gene to encode the protein making up the organism:
Viroid
Prions
virus
Virion
897. Pox virus has:
Double stranded DNA
Single stranded DNA
double stranded RNA
both a & b
898. Corona virus is enveloped virus. Hand sanitizers and surface cleaners were recommended to avoid covid epidemic. Which property of corona virus made these products reactive?
pH sensitivity
Heat sensitivity
ss RNA genome
Hypotonicity
899. Lysogenic viruses are also known as:
Enveloped phage
Virulent phage
Prophage
Bacteriophage
900. What does the term bacteriophage refer to?
A virus that infects bacteria
A bacterium that infects virus
A virus which behaves as bacteria
Combination of Bacterium & virion
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