11. 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.
12. Which of the following clearly define Lichens?
[A] Algae and fungi
[B] Algae and virus
[C] Fungi and virus
[D] Virus and bacteria
Show Answer
Correct Answer: A [Algae and fungi]
Notes:
Lichen is not a single organism. Rather, it is a symbiosis between different organisms – a fungus and an alga or cyanobacterium. Cyanobacteria are sometimes still referred to as blue-green algae.
13. Which branch of biology is known for the study of trees and shrubs?
[A] Forestry
[B] Horticulture
[C] Dendrology
[D] None of these
Show Answer
Correct Answer: C [Dendrology]
Notes:
Dendrology, also called forest dendrology or xylology, is the study of the characteristics of trees, shrubs, lianas, and other woody plants.
14. Which of the following branch of biology deals with the study of Cartilage?
[A] Chondrology
[B] Chromatology
[C] Cnidology
[D] Conchology
Show Answer
Correct Answer: A [Chondrology]
Notes:
Chondrology is the branch of anatomy that deals with cartilage.
15. Which branch of biology is known for the scientific study of the distribution of animals on Earth?
[A] Phytogeography
[B] Zoogeography
[C] Psychobiology
[D] Zoophytology
Show Answer
Correct Answer: B [Zoogeography]
Notes:
Zoogeography is the branch of biogeography that deals with the geographical distribution of animal species.
16. Who discovered cell differentiation?
[A] Walther Flemming
[B] Edwin John Butler
[C] Karl Ernst von Baer
[D] Parthasarthy Iyengar
Show Answer
Correct Answer: A [Walther Flemming]
Notes:
Cell differentiation is the process by which dividing cells change their functional or phenotypic type. All cells probably derive from stem cells and acquire their functions when they mature. Walther Flemming discovered cell differentiation.
17. Which of the following was defined by Gerardus Johannes Mulder?
[A] Vitamins
[B] Protiens
[C] Fats
[D] None of these
Show Answer
Correct Answer: B [Protiens]
Notes:
The protein was first described by Dutch chemist Gerardus Johannes Mulder and named by Swedish chemist Jöns Jacob Berzelius in 1838.
18. The viruses in an attenuated vaccine?
[A] have no genome
[B] continue to replicate
[C] are usually larger than bacteria
[D] is altered with chemicals
Show Answer
Correct Answer: B [continue to replicate]
Notes:
The viruses in an attenuated vaccine continue to replicate. Attenuated vaccines do not usually cause disease like those caused by the wild form of the organism.
19. The lysozyme which destroys the bacterial cell, releasing the mature virus is present where?
[A] immediate early phage genes
[B] late genes
[C] delayed early genes
[D] all of these
Show Answer
Correct Answer: B [late genes]
Notes:
The lysozyme which destroys the bacterial cell, releasing the mature virus is present in late genes.
20. Who is considered the “Father of Indian Bryology?
[A] Prof. K.C. Mehta
[B] Prof. D.D. Pant
[C] Prof. S.R. Kashyap
[D] Prof. P.N. Mehra
Show Answer
Correct Answer: C [Prof. S.R. Kashyap]
Notes:
Prof. S.R. Kashyap is considered the “Father of Indian Bryology” due to his research on Bryophyta especially from the Himalayan region.
