General Science - Online Test
Q1. What's the difference between natural selection and sexual selection?
Answer : Option A
Explaination / Solution:
Natural selection is the survival of members of species having some new traits that may help the organism in given surrounding. Sexual selection is a kind of natural selection as mating between similar organisms only leads to reproduction.
Q2. Which of the following is not a categories of contraceptive method
Answer : Option D
Explaination / Solution:
Artificial insemination is not a contraceptive device. It is a assisted reproductive technologies for infertile people. Natural method, barrier method and surgical methods are categories of contraceptive method.
Q3. A parallel plate capacitor of plate area A has a charge Q. The force on each plate of the capacitor is
Answer : Option D
Explaination / Solution:
Force between two plates of the capacitor The energy density The electric field and the charge density
Q4. The human genome contains __________ nucleotide bases.
Answer : Option D
Explaination / Solution:
Important Features of Human Genome:
- The human genome contains 3164.7 million nucleotide bases.
- The average gene consists of 3000 bases, but gene size vary greatly (the largest human gene is dystrophin containing 2.4 million bases).
- The total number of genes in the genome is estimated at 30,000 and all (99.9 percent) nucleotide bases are exactly the same in all people
- Functions of about 50% of the discovered genes are still unknown.
- Less than 2% of the genes of the genome codes for proteins.
- Chromosome1 has most genes (2968) and the Y has the fewest (231).
Q5. Which of the following hormone is produced in female only during pregnancy?
Answer : Option A
Explaination / Solution:
Relaxin is produced by corpus leteum and is responsible for the inhibition of uterine contraction. It also helps in dilation of the cervix. This hormone is produced only during pregnancy.
Q6. Aluminium when exposed to air protects itself from further attack by
Answer : Option B
Explaination / Solution:
Al forms a thick layer of oxide (Al2O3) on its surface which protects it from further attack.
Q7. The study of mankind in the ordinary business of life
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. In a regular polygon of n sides, each corner is at a distance of r from the center. Identical charges of magnitude Q are placed at (n -1) corners. The field at the center is
Answer : Option D
Explaination / Solution:
If the same charges are placed at all corners on polygon than the electric field at centre will be zero, but in given situation one charge is missing , so the field at the centre now become non zero and the net field at centre must be equal to the field which the missing charge exert such that the total field become zero So now the field at centre=field due to missing charge =
Q9. Natural selection is a process in which heritable variations enabling better survival are enabled to
Answer : Option A
Explaination / Solution:
Natural selection is a process in which heritable variations enabling better survival are enabled to reproduce and leave greater number of progeny in the habitat to increase in number faster than other species.
Q10. Name the spermicidal cream developed by Central Drug Research Institute (Lucknow), India.
Answer : Option A
Explaination / Solution:
Spermacid
