Biology - Online Test
Q1. What is the purpose of the Human Genome Project?
Answer : Option C
Explaination / Solution:
The Human Genome Project was an international research effort to provide a complete and accurate sequence of the 3 billion DNA base pairs that make up the human genome and to find all of the estimated 20,000 to 25,000 human genes.
The Project was coordinated by the National Institutes of Health and the U.S. Department of Energy.
Q2. Beginning of menstrual cycle is called as
Answer : Option D
Explaination / Solution:
At puberty, menstrual cycle begins in girls. The beginning of menstrual cycle is called menarche. It starts at the age of about 12 to 13 years in girls.
Q3. The age of rock is calculated on the basis of
Answer : Option C
Explaination / Solution:
The age of rock is calculated on the basis of number of strata present.Contained within the rock strata is evidence that the region was intensely dry 15,000 years ago. Having more number of strata means older the rock.
Q4. Oral contraceptives for the female containing non-steroidal preparation with very few side effects and high contraceptive value, “once a week pill”.
Answer : Option A
Explaination / Solution:
Saheli is oral contraceptive for the female containing non-steroidal preparation with very few side effects and high contraceptive value. It is once a week pill.
Q5. Human genome project was closely associated with the rapid development of a new area in biology called as
Answer : Option D
Explaination / Solution:
Human genome project was associated with the rapid development of new area of biology called as bioinformatics. This branch of biological science is used to known the sequence of gene on Chromosome of living organisms.
Q6. The period between fertilization and birth is called as
Answer : Option C
Explaination / Solution:
The period between fertilisation of ovum till the birth of will developed baby is called gestation period. It is about 10 months in human female.
Q7. 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.
Q8. 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.
Q9. 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).
Q10. 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.
