11. Which blood group is universal acceptor?
[A] O+
[B] AB+
[C] AB-
[D] O-
Show Answer
Correct Answer: B [AB+]
Notes:
AB +ve is the universal acceptor blood group or the universal receptors. Because AB+ individuals have all of the possible antigens and therefore are the universal acceptors as their immune system is used to seeing each of the antigens.
12. The young chicks come out of eggs within how many days after being hatched by the hen?
[A] One week
[B] Two weeks
[C] Three weeks
[D] Four weeks
Show Answer
Correct Answer: C [Three weeks]
Notes:
A hen that is committed to hatching chicks is known as a broody. The state of being broody is controlled by instinct, hormones and lighting conditions. Chicken come out of the eggs within the 21 days after being hatched by the hen. Some breeds take a little less and some a little longer. If the egg has not hatched after 25 days, it should be removed from the broody hen or incubator. Eggs need constant heat during the full incubation period for the embryo to develop into a chick.
13. At which of the following stages the sex of the offspring is determined?
[A] The conception takes place
[B] The sperm fertilises the ovum
[C] The embryo is partially developed
[D] The end of gestation period is near
Show Answer
Correct Answer: A [The conception takes place]
Notes:
Biological sex is determined by a pair of sex chromosomes: XY in males and XX in females. Genes on the X chromosome are said to be X-linked. X-linked genes have distinctive inheritance patterns because they are present in different numbers in females (XX) and males (XY).Thus usually occurs as soon as conception takes place.
14. Which of the following functions is not performed by Vitamins in the body? (UPSC Prelims 1982)
[A] They act as a source of energy
[B] The act as stimulant in the growth of the body
[C] They act as agent in regulating the chemical processes in the body metabolism
[D] All of the above
Show Answer
Correct Answer: A [They act as a source of energy]
Notes:
Vitamins are considered essential nutrients because they perform hundreds of roles in the body. They help shore up bones, heal wounds, and bolster your immune system. They also convert food into energy, and repair cellular damage. They do not act as a source of energy.
15. Which of the following is the name given to the population of cells derived from a single parent cell? (UPSC Prelims 1989)
[A] Haploid
[B] Diploid
[C] Symmetrical cell
[D] Clone
Show Answer
Correct Answer: D [Clone]
Notes:
Under suitable conditions, a single cell grows into a colony of cells on agar medium. The resulting population of genetically identical cells derived from a single parent cell is called a clone.
16. Which branch of biology is known for the study of tissues on artificial mediums?
[A] Pisciculture
[B] Silviculture
[C] Tissue Culture
[D] Horticulture
Show Answer
Correct Answer: C [Tissue Culture]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium isolated from the parent organism. This technique is also called micropropagation.
17. Who is known as father of soil science?
[A] Norman Ernest Borlaug
[B] V.V. Dokuchaev
[C] Liberty Hyde Bailey
[D] Eratosthenes
Show Answer
Correct Answer: B [V.V. Dokuchaev]
Notes:
Vasily Vasil’evich Dokuchaev is the father of soil science.
18. Which of the following was invented by Jonas Salk?
[A] Polio Drop
[B] Polio Vaccine
[C] BCG Vaccine
[D] aspirin
Show Answer
Correct Answer: B [Polio Vaccine]
Notes:
The first effective polio vaccine was developed in 1952 by Jonas Salk. Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus.
19. Which statement is true for the capsid?
[A] It consists of capsomeres
[B] This the outermost layer of most viruses
[C] It protects genetic material
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
A capsid is the protein shell of a type of virus, which encloses its genetic material.
20. Who among the following is considered as the “Father of Indian Phycology”
[A] Prof. M.O.P. Iyenger
[B] Prof. J.N. Mishra
[C] Prof. R.R. Mishra
[D] Prof. R.N. Singh
Show Answer
Correct Answer: A [Prof. M.O.P. Iyenger]
Notes:
MOP Iyengar from Madras is considered the father of Indian Phycology. He discovered Fritschiella heterotrichus terrestrial algae.
