31. Which two ideas are included in the definition of biotechnology?
[A] Medical biotechnology and Agricultural biotechnology
[B] Traditional biotechnology and Modern molecular biotechnology
[C] Blue biotechnology and Red biotechnology
[D] Green biotechnology and Animal biotechnology
Show Answer
Correct Answer: B [Traditional biotechnology and Modern molecular biotechnology]
Notes:
Traditional biotechnology and Modern molecular biotechnology are two ideas included in the definition of biotechnology.
32. What is another name of rDNA technology?
[A] chimeric DNA
[B] information technology
[C] information DNA
[D] chimeric technology
Show Answer
Correct Answer: A [chimeric DNA]
Notes:
chimeric DNA is another name of rDNA technology because it can be made of material from two different species, like mythological imagery. R-DNA technology uses palindromic sequences and leads to the production of sticky and blunt ends.
33. The method that silencing specific mRNA due to the binding of complementary dsRNA is called?
[A] Electrophoresis
[B] RNAi
[C] rDNA technology
[D] DNAi
Show Answer
Correct Answer: B [RNAi]
Notes:
The method that silencing specific mRNA due to the binding of complementary dsRNA is called RNAi.
34. Membrane lipids of chillsensitive plants contain ____:
[A] Low proportion of saturated fatty acids
[B] Equal proportion of saturated and unsaturated fatty acids
[C] Low proportion of unsaturated fatty acids
[D] High proportion of unsaturated fatty acids
Show Answer
Correct Answer: D [High proportion of unsaturated fatty acids]
Notes:
The membranes of chill sensitive plants have about a 2 :1 ratio of unsaturated to saturated fatty acids. It has been seen that the proportion of unsaturated membrane fatty acids increases and the critical temperature decreases so that chill-sensitive plants are more acclimitized to low temperatures.
35. The elements known as primary nutrients for plants are ____:
[A] Nitrogen, Phosphorus and Potassium
[B] Potassium, Boron and Nitrogen
[C] Nitrogen, Oxygen and Silicon
[D] Nitrogen, Phosphorus and Iron
Show Answer
Correct Answer: A [Nitrogen, Phosphorus and Potassium]
Notes:
Nitrogen (N), Phosphorus (P) and Potassium (K) are considered as the three essential or primary nutrients for plants. Together they make up the trio known as ‘NPK’. Other important nutrients are Calcium, Magnesium and Sulphur.
36. If a healthy freshwater fish is placed in salt water, what will be the expected consequence?
[A] The fish becomes dehydrated and dies
[B] The fish becomes bloated and dies
[C] The fish suffers from fungal or bacterial disease and dies
[D] There is no observable effect on the fish provided there is sufficient food
Show Answer
Correct Answer: A [The fish becomes dehydrated and dies]
Notes:
When freshwater fish is placed in salt water, the water molecules contained in the fish’s body would pass through the cell membranes of the fish, causing the fish to lose water by osmosis. This sudden change in the molecular makeup of the fish would cause the fish to undergo severe dehydration followed by death.
37. Which chromosomal combination is responsible for maleness in man?
[A] XO
[B] XXX
[C] XX
[D] XY
Show Answer
Correct Answer: D [XY]
Notes:
The chromosomes which determine the sex (maleness or femaleness) of an individual in sexually producing organisms are called sex chromosomes or allosomes. In humans an individual whose cells contain XX chromosomes (homo or isogametic) becomes a female, while one whose cells contains XY chromosomes (heterogametic) becomes a male.
38. 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.
39. Deficiency of iron causes ____:
[A] Goitre
[B] Anemia
[C] Rickets
[D] Scurvy
Show Answer
Correct Answer: B [Anemia ]
Notes:
Goitre: swelling of the neck or larynx resulting from enlargement of the thyroid gland due to iodine deficiency; Anemia: Iron deficiency anemia is a common type of anemia — a condition in which blood lacks adequate healthy red blood cells. Red blood cells carry oxygen to the body’s tissues. As the name implies, iron deficiency anemia is due to insufficient iron; Rickets: defective mineralization of bones due to deficiency or impaired metabolism of vitamin D; Scurvy: a disease resulting from a deficiency of vitamin C.
40. Which is a water soluble Vitamin?
[A] Vitamin A
[B] Vitamin C
[C] Vitamin D
[D] Vitamin K
Show Answer
Correct Answer: B [Vitamin C]
Notes:
Water-soluble vitamins are those that dissolve in water upon entering the body. Because of this, body cannot store excess amounts of water-soluble vitamins for later use. There are a total of nine water-soluble vitamins: the B vitamins- folate, thiamine, riboflavin, niacin, pantothenic acid, biotin, vitamin B6 and vitamin B12 and vitamin C.
