Transition state structure of the substrate formed during an enzy

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 Multiple Choice QuestionsMultiple Choice Questions

131.

Structural lipids of cell membrane are

  • simple lipid

  • chromolipids

  • steroid

  • phospholipids


132.

Which one of the following is polysaccharide?

  • Glycogen

  • Sucrose

  • Lactose

  • Maltose


133.

Which one of the following is not true for enzymes?

  • They act on a specific substrate

  • They are made up of fat and sugar

  • They act at a specific temperature

  • They act at a specific pH


134.

Identify the polysaccharide with  β-glycosidic bond

  • starch

  • glycogen

  • sucrose

  • cellulose


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135.

Simple storage protein that coagulates upon heating but remains soluble in dilute salt solution is correctly exemplified by

  • globulin

  • albumin

  • histone

  • collagen


136.

Inulin is a type of

  • protein

  • carbohydrate

  • lipid

  • nucleic acid


137.

Higher animals cannot synthesize few fatty acids which are very essential for their growth and deveiopment. These fatty acids are typically

  • saturated

  • cyclic

  • unsaturated

  • branched


138.

What is the substrate for lipase enzyme?

  • Protein

  • Carbohydrate

  • Lipid

  • Nucleic acid


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139.

What are ketone bodies?

  • Acetoacetic acid, acetone and beta-hydroxybutyric acid

  • Nicotinic acid, folic acid and ascorbic acid

  • Acetone, beta-hydroxybutyryl Co-A and acetoacetic acid

  • Acetic acid, acetone and beta-hydroxybutyric acid


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140.

Transition state structure of the substrate formed during an enzymatic reaction is

  • transient but stable

  • permanent but unstable

  • transient and unstable

  • permanent and stable


C.

transient and unstable

The substrate binds to the enzyme at its active site forming an enzyme substrate complex. This complex formation is a transient and unstable phenomenon. Later, the product is released from the active site, which makes all other intermediate structural states unstable. Hence, stability is related to energy status of the molecule or the structure.


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