CBSE
Multiple Choice QuestionsWhich ofthe following unsaturated fatty acid possess four double bond?
Arachidonic acid
Linolenic acid
Oleic acid
Linoleic acid
Identify the correct match from the type of amino acids and their respective example.
Neutral - Proline (Pro)
Acidic - Asparagine (Asn)
Aromatic - Tryptophan (Try)
S-containing - Methionine (met)
Polysaccharides, polypeptides and polynucleotides have in common that they all
contain amino acid
are formed in condensation reactions
contain nitrogen
come out in acid soluble pool
Which one of the followings is correct for the trans membrane proteins in lipid bilayer?
They are absent in animal cells
They act as channel proteins
They are absent in plant cells
They are only externally located
Which of the following statements is/are correct regarding the effects of pH on enzyme catalysed reactions?
Direction of the reaction is influenced by [H+]
Ionisation state of dissociating groups on the enzyme is modified
Ionisation state of the substrate is modified.
Protein is not denatured with the change in pH
Out of the given below statements describing the characteristics of various biomolecules, option for the incorrect one
Fatty acids have hydrocarbon chains that end in a carboxylic group
Starch consist of amylose and glycogen, which are formed by the condensation of -D-glucose.
Cellulose is fibrous polysaccharide of high tensile strength.
Cutin is a complex lipid produced by cross-esterification and polymerisation of hydroxy fatty acids.
An allosteric inhibitor of the enzyme acts by binding to the
substrate
product
catalytic site of the enzyme
non-catalytic site of the enzyme
Which one of the following combination of all three fatty acids are essential for human beings?
Oleic acid, linoleic acid and linolenic acid
Palmitic acid, linoleic acid and arachidonic acid
Oleic acid, linoleic acid and arachidonic acid
Linoleic acid, linolenic acid and arachidonic acid
Which one from those given below represents the position of nitrogen in the 9-membered double rings of purines?
2, 4, 6 and 8
1, 3, 7 and 9
1, 4, 8 and 9
3, 5, 7 and 8
When all the active sites of the enzyme are occupied, how does increasing the substrate concentration affect the rate ofreaction?
The rate of reaction will slow down
The rate of reaction will become constant, and shows no increase
The rate of reaction will increase with increasing substrate concentration
The rate of reaction will become reactive in such condition
