31. Which of the following is the role of the pons?
1. motor function
2. sensation
3. eye movement
4. hearing and taste
Select the codes above:
[A] Only 1 and 2
[B] Only 1, 2 and 3
[C] Only 2, 3 and 4
[D] 1, 2, 3, and 4
Show Answer
Correct Answer: D [1, 2, 3, and 4]
Notes:
The pons is part of a highway-like structure between the brain and the body known as the brainstem. The pons conveys information about motor function, sensation, eye movement, hearing, taste.
32. Bi-focal lenses are required to correct __
[A] astigmatism
[B] coma
[C] myopia
[D] presbyopia
Show Answer
Correct Answer: D [presbyopia]
Notes:
Bifocals are glasses that have both a correction for your distance vision on the top of the lens and a correction to help you read at the bottom.
33. Where are the genes for cytoplasmic male sterility in plants located?
[A] Chloroplast genome
[B] Mitochondrial genome
[C] Cytosome
[D] None of these
Show Answer
Correct Answer: B [Mitochondrial genome]
Notes:
The genes for cytoplasmic male sterility in plants are located in the Mitochondrial genome.
34. Which of the following is an example of a loose association of nitrogen-fixing bacteria?
[A] Rhizobium
[B] Blue-Green algae
[C] Azotobacter
[D] Azospirillum
Show Answer
Correct Answer: D [Azospirillum]
Notes:
Azospirillum is an example of a loose association of nitrogen-fixing bacteria. Azotobacter is an example of Free-Living Nitrogen-Fixing Bacteria. Rhizobium is an example of Symbiotic Nitrogen-Fixing Bacteria. Blue-Green alga is an example of Symbiotic Nitrogen-Fixing Cyanobacteria.
35. The term biomass most often refers to which of the following?
[A] Inorganic matter
[B] Organic matter
[C] Chemicals
[D] Ammonium compounds
Show Answer
Correct Answer: B [Organic matter]
Notes:
The term biomass most often refers to Organic matter. Organic material is that was alive and is now in or on the soil.
36. Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in ____:
[A] Peas
[B] Oats
[C] Corn
[D] Wheat
Show Answer
Correct Answer: A [Peas]
Notes:
Nitrogen-fixing bacteria are microorganisms capable of transforming atmospheric nitrogen into fixed nitrogen. Rhizobium is one such bacteria that is associated with leguminous plants (e.g., various members of the pea family). It invades the root hairs of host plants and convert free nitrogen to ammonia, which the host plant utilizes for its development.
37. Which of the following cell organelle contains DNA apart from nucleus?
[A] Golgi Apparatus
[B] Mitochondria
[C] Cytoplasm
[D] Ribosome
Show Answer
Correct Answer: B [Mitochondria]
Notes:
The three organelles that contain DNA are the nucleus, mitochondria and chloroplasts. Mitochondria are unlike most organelles (with an exception of plant chloroplasts) in that they have their own set of DNA and genes that encode proteins. They are specialized structures unique to the cells of animals, plants and fungi.
38. Hepatitis is a ____:
[A] Lung disease
[B] Liver disease
[C] Kidney disease
[D] Heart disease
Show Answer
Correct Answer: B [Liver disease]
Notes:
Hepatitis is a medical condition defined by the inflammation of the liver and characterized by the presence of inflammatory cells in the tissue of the organ. The condition can be self-limiting (healing on its own) or can progress to fibrosis (scarring) and cirrhosis.
39. In India and elsewhere, biomass can be obtained from ____:
[A] Sugarcane bagasse
[B] Groundnut shells
[C] Rice husk
[D] All of the above
Show Answer
Correct Answer: D [All of the above ]
Notes:
Biomass most often refers to plants or plant-based materials that are not used for food or feed, but as energy source. Biomass fuels come from things that once lived: wood products, dried vegetation, crop residues, aquatic plants and even garbage. It is known as ‘Natural Material’. As an energy source, biomass can either be used directly via combustion to produce heat, or indirectly after converting it to various forms of biofuel.
40. Photosynthesis takes place inside plant cells in ____:
[A] Ribosomes
[B] Nucleus
[C] Chloroplasts
[D] Mitochondria
Show Answer
Correct Answer: C [Chloroplasts]
Notes:
In plants, the process of photosynthesis takes place in the mesophyll of the leaves, inside the chloroplasts. Chloroplasts contain disc-shaped structures called thylakoids, which contain the pigment chlorophyll. Chlorophyll absorbs portions of the visible spectrum and captures energy from sunlight.
