11. Which among the following is the longest bone in human body?
[A] Stapes
[B] Femur
[C] Pelvis
[D] Sternum
Show Answer
Correct Answer: B [Femur]
Notes:
Femur is the longest and strongest bone in the human body. It is also called as the thigh bone.
12. Deficiency in which among the following leads to beriberi disease?
[A] Vitamin B1
[B] Vitamin B2
[C] Vitamin B3
[D] Vitamin B6
Show Answer
Correct Answer: A [Vitamin B1]
Notes:
Vitamin B1/Thiamine deficiency leads to a disease called beriberi. Over polishing of rice also leads to beriberi.
13. Which among the following is NOT a major function of the plant hormone Abscisic Acid?
[A] Abscission of Leaves
[B] Inhibition of growth and maintenance of the dormancy of buds
[C] Inhibition of germination in dormant seeds
[D] All of them are major functions of Abscisic Acid
All of above are major functions of Abscisic acid
Show Answer
Correct Answer: A [Abscission of Leaves]
Notes:
This question is might have trapped almost all of you. The option A which etymologically linked to the question would trap you. We should note that Abscisic acid plays any significant role in leaf abscission is unfortunately not proved. The hormone is also called Dormin and its major functions are inhibition. But abscission of leaves is something better explained by Auxin-ethylene roles. Kindly surf the web and try to find out, if I am right. Inhibition of growth and maintenance of the dormancy of buds are the most striking effects of ABA. ABA activity alone is not enough to keep the dormancy of buds up in the long term though. Further, ABA is an efficient inhibitor of germination and occurs in high concentrations in dormant seeds. The role ABA has during the abscission of fruits and leaves is largely unknown. Though both cases seem to be governed by similar mechanisms (Auxin-Ethylene to a great extent) has ABA nearly no effect on the abscission of leaves while it shows a clear effect on fruit abscission. The role of Abscisic acid in abscission was a pharmacological artifact…applied AbA often induces ethylene biosynthesis.
14. Who among the following is considered to be the father of neuroscience?
[A] Santiago Ramón y Cajal
[B] James Black
[C] Erwin Chargaff
[D] Jacques Cousteau
Show Answer
Correct Answer: A [Santiago Ramón y Cajal]
Notes:
Santiago Ramón y Cajal is often called the father of neuroscience. He won the Nobel Prize for Physiology/Medicine in 1906 for his theory, which became known as the neuron theory.
15. Which of the following is not a part of the three kingdom Classification by Ernest Haeckel?
[A] Plantae
[B] Protista
[C] Animalia
[D] Monera
Show Answer
Correct Answer: D [Monera]
Notes:
The Three Kingdom of Classification includes Plantae, Protista and Animalia. It was proposed by Ernest Haeckel.
16. Which of the following is a sexual spore?
[A] Ascospore
[B] Sporangiospore
[C] Conidia
[D] Zoospore
Show Answer
Correct Answer: A [Ascospore]
Notes:
The ascospore is a spore contained in an ascus; this type of spore is typical of fungi classified as ascomycetes.
17. How many cells are in the human brain?
[A] roughly 171 billion cells
[B] roughly 200 billion cells
[C] roughly 151 billion cells
[D] roughly 250 billion cells
Show Answer
Correct Answer: A [ roughly 171 billion cells]
Notes:
The average male brain contains about 171 billion cells, including about 86 billion neurons.
18. What is the shape of enveloped viruses?
[A] icosahedral
[B] helical
[C] roughly spherical
[D] complex
Show Answer
Correct Answer: C [roughly spherical]
Notes:
The shape of enveloped viruses is roughly spherical. Enveloped virus have glyco-protein spikes that arise from their envelopes.
19. Dicotyledonous branches are found in which of the following?
[A] Fern
[B] Funaria
[C] Liverworts
[D] Marchantia
Show Answer
Correct Answer: C [Liverworts]
Notes:
Dicotyledonous branches are found in Liverworts. Liverworts are also moss-like land plants that do not have a vascular system.
20. Where does reduction division take place in pteridophytes?
[A] Prothallus is formed
[B] Gametes are formed
[C] spores are formed
[D] sex organs are formed
Show Answer
Correct Answer: C [spores are formed]
Notes:
In ferns, the main plant body is sporophytic. Its leaves, known as sporophylls, have sporangia on them. Reduction division takes place in these spores, producing many spores from them. Spores are the initials of the gametophyte stage.
