11. Biometric is related to which of the following statement?
[A] the process of ageing, and the particular problems of old people
[B] heredity and variation
[C] body measurements and calculations related to human characteristics
[D] transmission of paternal traits to progeny
Show Answer
Correct Answer: C [body measurements and calculations related to human characteristics]
Notes:
Biometrics are calculations related to body measurements and human characteristics. Biometric authentication is used in computer science as a form of identification and access control.
12. Which of the following class of leucoplasts is responsible for fat storage?
[A] Amyloplast
[B] Proteinoplasts
[C] Aleuroplasts
[D] Elaioplasts
Show Answer
Correct Answer: D [Elaioplasts]
Notes:
Leucoplast is colorless or non-pigmented in nature. It is used for storage. Amyloplasts store starch, proteinoplasts and aleuroplasts as well as modify proteins.
13. Who among the following discovered the plasma membrane?
[A] Robert Hooke
[B] Albert von Kolliker
[C] George E. Palade
[D] Rudolf von Kölliker
Show Answer
Correct Answer: A [Robert Hooke]
Notes:
The plasma membrane is mainly composed of fatty-acid-based lipids and proteins. Robert Hooke discovered the plasma membrane.
14. Which of the following viruses shows the transformation of infected cells?
[A] Hepatitis B virus
[B] Human T cell lymphotronic virus type I
[C] Epstein-Barr virus
[D] All of these
Show Answer
Correct Answer: D [All of these]
Notes:
Hepatitis B virus, Human T cell lymphotronic virus type I and Epstein-Barr virus are the viruses shows the transformation of infected cells.
15. Classification is based on the following criteria?
[A] Plant body
[B] Vascular system
[C] Seed formation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Classification is based on the following criteria: Plant body, Vascular system and Seed formation
16. The gametophytic generation is predominant in which of the following?
[A] Pteridophyta
[B] Bryophyta
[C] Angiosperms
[D] Gymnosperms
Show Answer
Correct Answer: B [Bryophyta]
Notes:
Bryophytes are found in mosses and liverworts, in which the gametophyte is the major life stage, while in angiosperms and gymnosperms, the sporophyte is predominant.
17. What is the term for a type of leaf composed of just one leaflet?
[A] Unifoliate
[B] Bifoliate
[C] Trifoliate
[D] Multifoliate
Show Answer
Correct Answer: A [Unifoliate]
Notes:
Unifoliate leaves are composed of a single leaflet. This term is particularly used in botany to describe types of leaves, where ‘uni’ stands for one. The citrus plant is a good example of a unifoliate structure. Other terms like bifoliate, trifoliate, and multifoliate refer to leaves with two, three, or more leaflets respectively, indicating the complexity of leaf structure in diverse plant species.
18. When did the effect of cytokinin first appear?
[A] adding the liquid endosperm of papaya
[B] adding the liquid endosperm of coconuts
[C] adding the liquid endosperm of mango
[D] adding the liquid endosperm of grapes
Show Answer
Correct Answer: B [adding the liquid endosperm of coconuts]
Notes:
The effect of cytokinin was first observed when the addition of liquid endosperm of coconut to developing plant embryos in culture promoted their growth.
19. __ tissues synthesize natural cytokinins.
[A] Old
[B] Rapidly dividing
[C] Storage
[D] None of the above
Show Answer
Correct Answer: B [Rapidly dividing]
Notes:
Rapidly dividing tissues synthesize natural cytokinins. Cytokinins are produced in actively growing tissues such as embryos, developing fruits, and roots.
20. It is a colorless gas that acts as a signal hormone, which of the following is it?
[A] Benzene
[B] Nitric Oxide
[C] Ozone
[D] None of the above
Show Answer
Correct Answer: B [Nitric Oxide]
Notes:
Nitric Oxide is a colorless gas that acts as a signal hormone. Nitric oxide (NO) is a gaseous reactive oxygen species. It has evolved as a signaling hormone in many physiological processes in animals.
