General Science - Online Test
Q1. One mole of magnesium nitride on the reaction with an excess of water gives:
Answer : Option C
Explaination / Solution:
on hydrolysis roduces two moles of ammonia.
Q2. Inter-temporal comparison means
Answer : Option B
Explaination / Solution:
No Explaination.
Q3.
Assertion- Evolution is a continuous process that takes millions of years for speciation.
Reason- During evolution small variation accumulates guided by natural selection that leads to speciation.
Answer : Option D
Explaination / Solution:
Evolution is a slow and continuous process that takes long time to form a new species. Variation due to mutation, genetic drift, geographical isolation leads to speciation.
Q4. Which of the following is not a cause of male sterility?
Answer : Option B
Explaination / Solution:
Male sterility is mainly due to less number of sperm count or sperms motility is very less to fertile the ovum. The first case is called oligospermia and second case is called azoospermia. Tubal infertility is present in female.
Q5.
Genetic and physical map of genome was generated using information on
a. Polymorphism of restriction endonuclease recognition sites.
b. Repetitive DNA sequence called microsatellites.
Answer : Option C
Explaination / Solution:
Genetic and physical map of genome was generated using information on polymorphism of restriction endonuclease recognition sites and repetitive DNA sequence called microsatellites.
Q6. Which one is correctly matched pair
Answer : Option B
Explaination / Solution:
Transfer of male gamete into female genital tract takes place during sexual intercourse, which is also called as coitus. Clitoris is the part of female reproductive system, colostrum is first milk secreted from mammary gland.
Q7.
The geometry of a complex species can be understood from the knowledge of type of hybridisation of orbitals of central atom. The hybridisation of orbitals of central atom in and the geometry of the complex are respectively
Answer : Option D
Explaination / Solution:
In B is tetrahedrally surrounded by 4 ion.
Q8. Following are the factor of production except
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. Genetic drift
Answer : Option B
Explaination / Solution:
Genetic drift is a mechanism of evolution in which allele frequencies of a population change randomly over generations due to chance (sampling error). Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations.
Q10. Which of the following is not a cause of male sterility?
Answer : Option C
Explaination / Solution:
Male sterility is mainly due to less number of sperm count or sperms motility is very less to fertile the ovum. The first case is called oligospermia and second case is called azoospermia. Tubal infertility is present in female.
