General Science - Online Test
Q1. Overhangs produced by restriction enzymes are called as
Answer : Option D
Explaination / Solution:
Longer overhangs are called cohesive ends or sticky ends. They are most often created by restriction endonucleases when they cut DNA.
Q2.
Counter current mechanism :
i. It operates in all vertebrates.
ii. It produces hypertonic urine.
Answer : Option D
Explaination / Solution:
Counter current mechanism operates in mammals but not in all vertebrates. Due to counter current mechanism it produces hypertonic urine, highly concentrated.
Q3. Clausius statement of Second Law of Thermodynamics states that
Answer : Option D
Explaination / Solution:
It is impossible for a self acting machine unaided by any external agency to transfer heat from a cold to a hot reservior. In other words,heat by itself cannot pass from a colder to a hotter body.
Q4. Darwin judged the fitness of an individual by
Answer : Option C
Explaination / Solution:
Darwin judged the fitness of an individual by number of offspring the individual produce in particular niche. More the viable offspring formed the more fit the organism in that surrounding.
Q5. Above the Critical temperature of carbon dioxide
Answer : Option D
Explaination / Solution:
Tc is the highest Temp where a gas can exist in liquid state. Above this no liquid state exist hence it is not possible to liquify the gas no matter what pressure is applied.
Q6. A catalyst increases the rate of the chemical reaction for the conversion of reactants to products by
Answer : Option C
Explaination / Solution:
A catalyst increases the rate of the chemical reaction by making available a new low energy pathway for the conversion of reactants to products. It increases the rate of forward and reverse reactions that pass through the same transition state and does not affect equilibrium. Catalyst lowers the activation energy for the forward and reverse reactions by exactly the same amount. Catalyst does not affect the equilibrium composition of a reaction mixture. It does not appear in the balanced chemical equation or in the equilibrium constant expression.
Q7. The bond –CO–NH– is called
Answer : Option B
Explaination / Solution:
Peptide linkage is present in proteins formed by combination of amino acids.
Q8. Aerating pores in the bark of plants is known as
Answer : Option B
Explaination / Solution:
In plants respiratory organs in stem is called lenticels. They are located as pores in the bark of plants.
Q9. Which one is not a phase of Growth
Answer : Option D
Explaination / Solution:
Growth phase consists of leg phase, exponential phase and stable phase. It do not consist of linear phase.
Q10. Paschen series emission wavelengths are described by
Answer : Option D
Explaination / Solution:
No Explaination.
