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Quiz 44
Mdcat-past-papers - UHS Quiz
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Board: UHS |
861. Each chain of DNA is formed by the union many nucleotides by means of:
Double bond
Phosphodiester bond
Covalent bond
Hydrogen bond
862. The sugar which is part of ribonucleic acid is:
Ribulose
Ribose
Deoxyribulose
Deoxyribose
863. The simplest amino acid is:
Lysine
Glycine
alanine
Proline
864. RV4 does not contain:
Lysine
Cytosine
phosphate
Thymine
865. Except during nuclear division, the nucleus has the chromosome in a loosely coiled state known as:
Gene
Ribosomes
DNA
Chromatin
866. An enzyme and substrate reacts through a special feature or site present on:
Building site
Active site
Catalyst site
Inhibitory site
867. Enzymes are derived from:
Proteins
Nucleic acids
Carbohydrates
Vitamins
868. Which molecular structure of enzyme is essential for the activity of enzyme:
Primary
Secondary
Quaternary
Tertiary
869. All enzymes requires Mg to catalyse the reaction. Mg is called:
Co-Enzyme
Activator
Co-Factor
Allosteric site
870. Enzymes lower the activation energy by stabilizing the transition state of a metabolic reaction due to:
Changing conditions within the active site
Changing conditions within the protein framework
Rearranging the fatty acids in active site
Distorting the molecules in allosteric site
871. NAD is an important:
Enzyme
Hormones
Co-enzyme
Vitamins
872. The active site of enzymes are composed of:
few nucleotides
few saccharides
few nucleosides
few amino acids
873. The major enzymes involved in transfer of phosphate group from ATP to Glucose is:
Isomerase
Kinase
Dehydrogenase
Decarboxylase
874. Induced fit model of enzyme activity suggests that an enzyme:
Cannot modify its active sites
Can bind to a single substrate
Can catalyse related reaction
Usually belongs to non-regulatory enzyme
875. Enzymes work by lowering the ___ of the reactions they catalyze.
Kinetic energy
Activation energy
Heat energy
Potential energy
876. Enzymes work by lowering the ___ of the reactions they catalyze
Kinetic energy
Activation energy
Heat energy
Potential energy
877. Many enzymes are secreted in inactive form to protect:
Mitochondria
Cell DNA
Cell membrane
Vacuole
878. What happens to the enzyme after an enzyme catalyzed reaction
Reduced to inactive form
Changes into substrate
become inert
used for another reaction
879. Non protein but inorganic detachable co-factor is called:
Activator
Prosthetic group
Co-enzyme
Apo-enzyme
880. Which enzyme works in alkaline pH?
Pepsin
Sucrose
enterokinase
Pancreatic lipase
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