Biology - Online Test
Q1. The alternate forms of a gene is called
Answer : Option B
Explaination / Solution:
The alternate forms of a gene are called alleles. Each trait is controlled by a pair of alleles.
Q2.
Respiratory Quotient for the reaction
Answer : Option B
Explaination / Solution:
RQ is equal to number of carbon dioxide molecules produced divided by number of oxygen molecules used during respiration. Here, RQ = 57/80 = 0.71.
Q3. Humulin is a
Answer : Option B
Explaination / Solution:
Humulin is protein that contains insulin isophane and insulin regular. It’s a manmade hormone that lowers the blood sugar level in blood.
Q4. Match the following:
Pollutant
a) nitrogen oxides
b) fluorides
c) PCBs
d) Chlorofluorocarbons
Source
i) jet aeroplane emissions
ii) coal burning
iii) lightening
iv) burning plastics
Pollutant
a) nitrogen oxides
b) fluorides
c) PCBs
d) Chlorofluorocarbons
Source
i) jet aeroplane emissions
ii) coal burning
iii) lightening
iv) burning plastics
Answer : Option B
Explaination / Solution:
Nitrogen oxides is released by lightening, fluorides from coal burning, PCBs from burning plastics and chlorofluorocarbons from jet aeroplanes emissions.
Q5. Genetic variation is created and inherited during
Answer : Option C
Explaination / Solution:
During sexual reproduction, gamete carrying different genetic combination unit together and variation in offspring is created that is inherited from generation to next generation.
Q6. The type of aestivation shown by the diagram below is
Answer : Option D
Explaination / Solution:
The diagram shows 
which is a vexillary aestivation.
Vexilary aestivation is a mode of aestivation in which one large upper petal folds over, and covers, the other smaller petals, as in most papilionaceous plants.
Q7. The resting phase is otherwise called as
Answer : Option D
Explaination / Solution:
The interphase, though called the resting phase, is the time during which the cell is preparing for division by undergoing cell growth in an orderly manner. No divisional activities occur during this phase. Hence the name.
Q8. The goi is able to multiply in the bacterial cell because of
Answer : Option A
Explaination / Solution:
The goi (gene of interest) is able to multiply in bacterial cell because of Ori (Origin of replication)in the plasmid of bacterial cell. Ori is a particular sequence in a genome at which replication is initiated.
Q9. Urinary bladder helps to :
Answer : Option C
Explaination / Solution:
The urinary bladder is a hollow elastic organ that functions as the body's urine storage tank. Urine produced by the kidneys flows through the ureters to the urinary bladder, where is it stored before passing into the urethra and exiting the body.
Q10. Which one of the following is present today but was absent about 3.5 billion years ago?
Answer : Option B
Explaination / Solution:
Oxygen is present today in atmosphere but it was absent in atmosphere about 3.5 billion ago when origin of life begun on earth surface.
