Question

2

1

1. Chemical reactions carried out by living systems depend upon the ability of some organisms to capture and use matter (atoms, ions, molecules) from non-living sources in the environment. The specific subset of these reactions that break down nutrients in food is called _________, whereas biosynthetic pathways form the subset called _______ and some biochemical pathways that include both types are called _______.

   	A.	catabolism, anabolism, amphibolic
   	B.	catabolism, anabolism, oxidation reactions
   	C.	hydrolysis, reducing reactions, biosynthesis
   	D.	anabolic, amphibolic, anaplerotic

22.

1. Find the mismatched pair function–protein:

   	A.	Insulin – Primary messenger in hormonal signaling
   	B.	Ferritin – Prokaryotic transcription factor
   	C.	Cloned green fluorescent protein – Artificial intracellular marker
   	D.	Rhodopsin – Light receptor

24.

1. Find the incorrect statement:

   	A.	Enzymes may be active inside and outside the cell.
   	B.	Substrate binding and catalysis depend on specific amino acids present in the active site.
   	C.	Enzymes possess certain specific domains called active sites, where catalysis take place.
   	D.	All enzymes are proteins.

Answer 1

21.A

catabolism is breakdown of nutrient in food eg. by hydrolysis and oxidation of protien, carbohydrates and fats

anabolism is where the biosynthesis take splace

amphibolic is used when both breakdown and biosynthesis takes place

anaplerotic reactions are the intermediates chemical reactions of a pathway

22.B

ferritin protein is used for iron storage.its translation and transcription is dependent on cell iron status

23.D

all enzymes are not proteins. example-ribozymes-it has RNA molecule which catalyses the reaction such as splicing of mRNA