11. In the eye donation, which part of the eye is transplanted from the donor? (UPSC Prelims 2001)
[A] Cornea
[B] Lens
[C] Retina
[D] The whole eye
Show Answer
Correct Answer: A [Cornea]
Notes:
There is currently no way to transplant an entire eye. Ophthalmologists can, however, transplant a cornea. When someone says they are getting an “eye transplant,” they are most likely receiving a donor cornea, which is the clear front part of the eye that helps focus light so that you can see.
12. Which branch of medicine deals with the scientific study of the structure of teeth and diseases associated with it?
[A] Virology
[B] Opthalmology
[C] Cosmology
[D] Odontology
Show Answer
Correct Answer: D [Odontology]
Notes:
Odontology is a branch of medicine which deals with the structure and diseases related to the teeth.
13. Who is known as the ‘God of plants’?
[A] Soma
[B] Varuna
[C] Rudra
[D] Indra
Show Answer
Correct Answer: A [Soma]
Notes:
Soma is also known as the God of plants or the king of gods or the special god of the Brahmanas. All the hymns of the eleventh mandal are assigned to him. Aryans considered Himalaya as the source of the soma plant.
14. Which branch of biology is known for the study of flowers?
[A] Dendrology
[B] Anatomy
[C] Agrostology
[D] Anthology
Show Answer
Correct Answer: D [Anthology]
Notes:
The study of flowers and flowering plants is known as anthology. Anthos means a flower and Logia means collection.
15. 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.
16. Gonyaulax, which are known for causing red tides, belong to which of the following?
[A] Algae
[B] Fungi
[C] Protista
[D] Bacteria
Show Answer
Correct Answer: C [Protista ]
Notes:
Red tides are caused by Gonyaulax which are small, microscopic organisms that grow in water and also called dinoflagellates.
17. Which of the following organelles is absent in animal cells and present in plant cells?
[A] Cytoplasm
[B] Cell wall
[C] Vacuoles
[D] Mitochondria
Show Answer
Correct Answer: B [Cell wall]
Notes:
The cell wall surrounds the plasma membrane of plant cells. The cell wall is a fairly rigid layer that surrounds a cell located outside the plasma membrane.
18. Which of the following causes chloroplasts to be green?
[A] because they contain the pigment cobalt
[B] because they contain the pigment chlorophyll
[C] because they contain the pigment carotenoids
[D] because they contain the pigment betacyanins
Show Answer
Correct Answer: B [because they contain the pigment chlorophyll]
Notes:
Chloroplasts are green because they contain the pigment chlorophyll, which is important for photosynthesis. Chlorophyll occurs in many different forms. Chlorophyll a and b are the major pigments of higher plants and green algae.
19. The biological nature of the virus came from studies by the Russian scientist ____ in 1892 and by the Dutch scientist ____ in 1898.
[A] Dmitry I. Ivanovsky, Martinus W. Beijerinck
[B] Martinus W. Beijerinck, Dmitry I. Ivanovsky
[C] Félix H. d’Hérelle, Frederick W. Twort
[D] Frederick W. Twort, Félix H. d’Hérelle
Show Answer
Correct Answer: A [Dmitry I. Ivanovsky, Martinus W. Beijerinck]
Notes:
The biological nature of viruses was discovered in 1892 by the Russian scientist Dmitry I. Ivanovsky and in 1898 the Dutch scientist Martinus W. Beijerinck’s studies.
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.
