Biological Macromolecules, Enzymes, and Metabolites
Important Macromolecules, Enzymes and Metabolites of life
Questions
The enzyme associated with neutrophil granulocytes in human blood is called
- cytochrome c oxidase
- peroxidase
- myeloperoxidase
- guanylate cyclase
- colipase
Which of the following is the chief metabolite of bupropion?
- Hydroxybupropion
- Hydroxycarteolol
- Kynurenine
- 3-Methoxymorphinan
- Seproxetine
The enzyme cytochrome c oxidase is a large transmembrane protein complex found in bacteria and the mitochondrion of eukaryotes.
- Human brain cannot utilise fatty acids as an energy source.
- Liver cells can synthesise and store triglycerides.
- The triglycerides form chylomicrons.
- The process lipolysis takes place in the intestine.
- In triglyceride form, lipids cannot be absorbed by jejunum.
Which of the following statements does NOT characterise unsaturated fats?
- Meat products contain both saturated and unsaturated fats.
- Replacing saturated fats with unsaturated fats helps to lower the levels of total cholesterol in human beings.
- Unsaturated chains have a lower melting point.
- Unsaturated fats are popular with manufacturers of processed foods.
- Double bonds may be either in a cis or a trans isomer.
The metabolite observed in a huge amount in the plasma and urine of people suffering from malignant melanoma is called
- carboxycyclophosphamide
- cysteinyldopa
- dehydroepiandrosterone sulphate
- desmethylsertraline
- desvenlafaxine
The fatty acid having antimicrobial pesticide properties is called
- heptanoic acid
- caprylic acid
- nonanoic acid
- lauric acid
- tridecylic acid
The fatty acid which forms the glycerides of human adipose tissue is
- hexanoic acid
- valeric acid
- butyric acid
- propanoic acid
- palmitoleic acid
The fatty acid found in seeds and nuts is called
- α-linolenic acid
- dihomo-γ-linolenic acid
- eicosapentaenoic acid
- linoleic acid
- gamma-linolenic acid
Which of the following is a precursor of lysine in the alpha-aminoadipate pathway?
- Saccharopine
- Allysine
- α-Aminoadipic acid
- α-Ketoadipic acid
- Isovaleryl-coenzyme A
The amino acid which has a fat-dissolving effect is
- taurine
- ornithine
- methionine
- carnitine
- arginine
The fatty acid found in cerebroside is called
- gamma-linolenic acid
- stearidonic acid
- α-linolenic acid
- lignoceric acid
- paullinic acid
Which of the following statements regarding metabolites is INCORRECT?
- Alcohol is a primary metabolite.
- The metabolome forms a large network of metabolic reactions.
- The rate of degradation of a metabolite is an important determinant of the duration and intensity of its action.
- Some antibiotics use sceondary metabolites as precursors.
- A secondary metabolite has an important ecological function.
Which of the following statements regrading enzyme catalysis is INCORRECT?
- The mechanism of enzyme catalysis is similar in principle to other types of chemical catalysis.
- Enzymes provide an alternative reaction route.
- The induced fit model proposes that the initial interaction between the enzyme and the substrate is very strong.
- The advantages of the induced fit mechanism arise due to the stabilising effect of strong enzyme binding.
- Saturated enzymes have a high affinity substrate binding capacity.
The pungent odour of sulphur compounds is called
- aldolase
- triose phosphate isomerase
- trypsin
- cellulase
- alliinase
The active metabolite of paracetamol is
- benzoylecgonine
- AM404
- calcitroic acid
- ethanol
- methanol