Top 1000+ Solved Biology (GK) MCQ Questions Answer
Q. Which is the effect of antigen in an ill person?
a. It increases the production of W.B.C.
b. It increases the production of antibiotics
c. It increases the production of antiserum against bacteria
d. It prevents the growth of bacteria
Q. Which of the following is true?
a. DNA is the genetic material in most of the organism
b. RNA is the genetic material in most viruses and bacteria
c. DNA is the genetic material in all the viruses
d. RNA is the genetic material in all the viruses
Q. Which of the following is incorrect?
a. AIDS is retroviral disease
b. AIDS is transmitted by homo and hetero- sexual contact
c. AIDS was first recognised in USA in 1981
d. AIDS causes ono-genital warts
Q. Mitosis is a type of cell division in which -
a. The chromosomes maintain their original number
b. The chromosome number is reduced to half
c. The Chromosome number is doubled
d. The chromosome number is reduced to one fourth
Q. The danger signals are red while the eye is more sensitive to yellow because –
a. absorption in red is less than yellow and hence red is visible from a distance
b. scattering in yellow light is less than red
c. the wavelength of red light is more than yellow light
d. none of the above reasons
Q. Hashish is obtained from aplant. From which part of the plant is it obtained?
a. Leaves
b. Stem
c. Exudate from leaves and female inflorescences.
d. Exudate from stem and male inflorescences.
Q. A test tube baby means :
a. a baby grown in a test tube.
b. embryo fertilised in uterus and developed in test tube.
c. embryo fertilised and developed in uterus.
d. fertilisation in vitro and then transplantation in the uterus.
Q. Why radiologists do not take direct X- ray photographs of intestine?
a. Intestines are affected by direct exposure to X-rays
b. X-rays can not cross intestine
c. X-rays are not able to capture clear picture
d. Even short exposure of X-rays causes cancer in intestine
Q. What is an antibiotic?
a. A chemical compound produced by a living organism that inhibits the growth of other organisms
b. Acompound synthesised by a living organism that inhibits the growth of microbes
c. Asynthetic compound inhibiting the growth of other organisms
d. Asynthetic compound inhibiting the growth of bacteria
Q. Triple vaccine is administered to a new born child to immunize it against -
a. whooping cough, tetanus and measles
b. whooping cough, tetanus and diphtheria
c. tetanus, diphtheria, measles and rubella
d. tetanus, diphtheria, small pox and rubella
Q. Antidiuretic hormone (ADH) -
a. inhibits the secretion of growth hormone by the pituitary
b. inhibits the rate of heart beat
c. causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules
d. causes an increase in the blood pressure
Q. Exobiology deals with the study of -
a. external characters of living organisms
b. life on the surface of the earth
c. life in the outer layers of atmosphere
d. life in other planets and space
Q. Heart attack occurs due to :
a. Bacterial attack on the heart
b. Stopping of heart beat
c. Lack of blood supply to the heart itself
d. Impairment of heart’s working due to unknown reasons
Q. What is an endoscope?
a. It is an optical instrument used to see inside the alimentary canal
b. It is a device which is fitted on the chest of the patient to regularize the irregular heart beats
c. It is an instrument used for examining ear disorders
d. It is an instrument for recording electrical signals produced by human muscles
Q. Some viruses have RNA but no DNA. This would indicate that –
a. these viruses cannot replicate
b. these viruses have no heritable information
c. RNA transmits the hereditary information in these viruses
d. their nucleic acids can be crystallised