MOST FREQUENTLY ASK BIOCHEMISTRY QUESTION WITH ANSWER 2015

MOST FREQUENTLY ASK BIOCHEMISTRY  QUESTION WITH ANSWER 2015

 

1.Two molecules that are isomers:
A.must contain the same functional groups
B.often differ in the number of unsaturated bonds they possess
C.have the same molecular formulas
D.often have different masses

ANS C

2.In which of the following kinds of organic compounds does a carbon atom bond ONLY to hydrogen and other carbon atoms?
A.Carbohydrates
b.fatty acid
c.lipid
D.hydrocarbons

ANS D

3.Glycogen is best defined as a:
A.storage form of lipids
B.storage form of glycerol
C.polymer of lactose
D.polymer of glucose

ANS D

4.Most biologically important atoms attempt to possess HOW MANY           electrons in their outermost energy level.
A.2
B.4
C.8
D.10

ANS C

5.Which molecule does NOT have a polar covalent bond  ?
A. H2O
B. H-H
C. H-F
D. H-Br

ANS B

6.Which one of the four classes of biologically important molecules does CELLULOSE belong to ?
A.Carbohydrates
B.fatty acid
C.lipid
D.hydrocarbons

ANS A

7.With respect to proteins, the primary structure refers to the ?
A. helix or pleated sheet pattern of a polypeptide
B.complex 3-dimensional folding pattern of a polypeptide
C.interaction of more than one polypeptide chain
D.ordered sequence of amino acids in a polypeptide

ANS D

8.glucose + fructose = ??
A.maltose
B.sucrose
C.cellulose
D.LACTOSE

ANS B

9.An athlete is tested at an Olympic event and STEROIDS are found in the bloodstream. Which class of biologically important molecules are steroids related to ??
A.Carbohydrates
B.Nucleic acid
C.lipid
D.protein

ANS D

10.Glucose + galactose =??
A.maltose
B.sucrose
C.cellulose
D.Lactose

ANS D

11. Which of the following is CORRECT for an exergonic reaction?
A.more activation energy is needed than for an endergonic reaction
B.less activation energy is needed than for an endergonic reaction
C.products have more energy than reactants
D.products have less energy than reactants

ANS D

12.Unlike triglycerides, phospholipid molecules:?
A.have 1 lipid tail
B.have 4 lipid tails
C.have 2 lipid tails
D.have 3 lipid tails

ANS C