31. Which of the following nonpathogenic products is used in various crops as well as horticulture and ornamental plants?
[A] Azotobacter
[B] Fungi
[C] Tricho-Card
[D] None of these
Show Answer
Correct Answer: C [Tricho-Card]
Notes:
Tricho-Card is a nonpathogenic product that is used in various crops as well as horticulture and ornamental plants.
32. A molecule that contains nitrogen and has the chemical properties of a base is called __
[A] RNA
[B] Nitrogenous base
[C] Bacteria
[D] Plasmid
Show Answer
Correct Answer: B [Nitrogenous base]
Notes:
A molecule that contains nitrogen and has the chemical properties of a base is called a Nitrogenous base. Nucleic acids are composed of a combination of 5 nitrogenous bases:
1. Guanine and adenine are double-ringed purine molecules.
2. Cytosine, thymine, and uracil are single-ringed pyrimidine molecules.
33. In coriander, the useful parts are
____:
[A] Leaves & flowers
[B] Flowers & dried fruits
[C] Roots & leaves
[D] Leaves & dried fruits
Show Answer
Correct Answer: D [Leaves & dried fruits]
Notes:
Coriander (Coriandrum sativum), also known as cilantro, Chinese parsley or dhania, is an annual herb in the family Apiaceae. All parts of the plant are edible, but the fresh leaves and the dried seeds are the parts most traditionally used in cooking.
34. Just born baby has the respiratory rate as ____:
[A] 15 times/minute
[B] 18 times/minute
[C] 26 times/minute
[D] 32 times/minute
Show Answer
Correct Answer: A [15 times/minute]
Notes:
New born babies and children normally breathe faster than older children and adults. Their respiratory rate is about 30-60 breaths per minute. The respiratory rate for the different age-categories of children is:-6-12 months: 24-30; 1-5 years: 20-30; 6-12 years: 12-20.
35. ____ is a straw coloured, viscous fluid constituting nearly 55 per cent of the blood:
[A] Plasma
[B] Formed Elements
[C] Blood Groups
[D] Coagulation of Blood
Show Answer
Correct Answer: A [Plasma]
Notes:
Plasma is a straw coloured, viscous fluid constituting nearly 55 per cent of the blood. 90-92 per cent of plasma is water and proteins contribute 6-8 per cent of it. Fibrinogen, globulins and albumins are the major proteins. Fibrinogens are needed for clotting or coagulation of blood; while, globulins primarily are involved in defense.
36. The type of fruit obtained from a multicarpillary, apocarpous gynoecium is ____:
[A] Composite
[B] Multiple
[C] Aggregate
[D] Simple
Show Answer
Correct Answer: C [Aggregate]
Notes:
Aggregate fruits are the group of fruitlets which develop from the multicarpellary, apocarpous ovary. Flowers with apocarpous multiple gynoecium are apt to give rise to a number of fruits as there are a number of free ovaries, each capable of giving rise to one fruit. Berries are good example of such fruits.
37. Which of the following vitamins contain nitrogen?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: B [Vitamin B]
Notes:
Vitamin B contains nitrogen atoms that allow them to participate in regulating metabolism. For example, Vitamin B3 is a water soluble vitamin containing compound Niacin or Niacinamide, a nitrogen containing vitamin.
38. Which of the following protein is found in hair?
[A] Actin
[B] Histone
[C] Keratin
[D] Elastin
Show Answer
Correct Answer: C [Keratin]
Notes:
Keratin is a family of fibrous structural proteins that is the key structural material making up hair, horns, claws, hooves, and the outer layer of human skin. Keratin is also the protein that protects epithelial cells from damage or stress. Some keratins have also been found to regulate key cellular activities, such as cell growth and protein synthesis.
39. Allosomes are _____:
[A] Cell organelles
[B] Plant hormones
[C] Alleles
[D] Sex chromosomes
Show Answer
Correct Answer: D [Sex chromosomes]
Notes:
An allosome is a sex chromosome that differs from an ordinary autosome in form, size, or behaviour. The human sex chromosomes are a typical pair of allosomes. In typical ovum, there is a pair of X-chromosomes while sperm has X and Y chromosome each.
40. In which part of the female flower does fertilisation take place?
[A] Ovary
[B] Style
[C] Stigma
[D] Filament
Show Answer
Correct Answer: A [Ovary]
Notes:
A flower is the reproductive structure of many plants. The carpel is the female reproductive structure that produces eggs. The stamen is the male reproductive structure that produces sperm. Fertilization takes places in the ovary of the female flower. When a carrying agent like wind/
water/ animals carry pollen grains from male anthers to the female flower part i.e. stigma, a pollen tube forms and the pollen grain travels down the style and finally reaches the ovary where it fertilizes an ovule.