31. The transfer of genetic traits from parents to their offspring, and these offspring receive all the genetic information from their parents is called__
[A] Inheritance
[B] Genetics
[C] Heredity
[D] None of these
Show Answer
Correct Answer: A [Inheritance]
Notes:
The transfer of genetic traits from parents to their offspring, and these offspring receive all the genetic information from their parents is called Inheritance.
32. Which of the following is called Mendel’s first law of inheritance?
[A] Law of Dominance
[B] Law of Segregation
[C] Law of Independent Assortment
[D] All of the above
Show Answer
Correct Answer: A [Law of Dominance]
Notes:
The law of dominance is also called Mendel’s first law of inheritance. According to this, the hybrid offspring will only inherit the dominant trait in the phenotype.
33. Which of the following is an oncogenic trait?
[A] a type of trait whose phenotype is influenced by more than one gene
[B] a trait produced by the effect of a gene or an allele.
[C] a gene that has the potential to cause cancer.
[D] None of these
Show Answer
Correct Answer: C [a gene that has the potential to cause cancer.]
Notes:
A gene that has the potential to cause cancer is called an oncogenic trait.
34. A nitrogen-fixing bacterium that forms loose associations with the roots of crop plants is __.
[A] Azotobacter
[B] Bacillus polymyxa
[C] Clostridium
[D] Azospirillum
Show Answer
Correct Answer: D [Azospirillum]
Notes:
A nitrogen-fixing bacterium that forms loose associations with the roots of crop plants is Azospirillum.
35. 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.
36. Which of the following are the largest fixator of solar energy?
[A] Bacteria
[B] Protozoa
[C] Fungi
[D] Green plants
Show Answer
Correct Answer: D [Green plants]
Notes:
Plants and photosynthetic organisms utilize this solar energy in fixing large amounts of CO2 while amounts consumed by human beings are relatively small representing only 10% of the energy converted during photosynthesis. The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce organic compounds and oxygen.
37. With which one of the following Jacobsons organ is related to?
[A] Vision
[B] Chewing
[C] Hearing
[D] Smelling
Show Answer
Correct Answer: D [Smelling]
Notes:
Jacobson’s organ, also called vomero-nasal organ, is a patch of sensory cells within the main nasal chamber that detects heavy moisture-borne odour particles. It is a “sense of smell” receptor that is actually not receptive to ordinary odours.
38. Fat soluble vitamins are ____:
[A] Tocopherol, Niacin, Cyanocobalamin
[B] Calciferol, Carotene, Tocopherol
[C] Ascorbic acid, Calciferol, Riboflavin
[D] Thiamine, Carotene, Biotin
Show Answer
Correct Answer: B [Calciferol, Carotene, Tocopherol]
Notes:
Calciferol (Vitamin D); Tocopherols and tocotrienols (Vitamin E); Phylloquinone, menaquinones (Vitamin K); and Retinol, retinal, and four carotenoids including beta carotene (Vitamin A) are all fat soluble vitamins. Out of total of 64 codons are nonsense codon. They do not code for any amina acid.
39. Which of the following human gland produces Insulin?
[A] Spleen
[B] Pancreas
[C] Liver
[D] Pituitary Gland
Show Answer
Correct Answer: B [Pancreas]
Notes:
Insulin is a hormone secreted by the pancreas that is important for metabolism and utilization of energy from the ingested nutrients – especially glucose. It keeps our blood sugar level from getting too high (hyperglycemia) or too low(hypoglycemia). The pancreas is a glandular organ in the digestive system and endocrine system of vertebrates.
40. Which of the following is one of the commercial products obtained from Gelidium and Gracilaria and are used to grow microbes and in preparations of ice-creams and jellies?
[A] Chlorella
[B] Agar
[C] Spirullina
[D] Gymnosperms
Show Answer
Correct Answer: B [Agar]
Notes:
Agar, one of the commercial products obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies. The gelling agent in agar is an unbranched polysaccharide obtained from the cell walls of Gelidium and Gracilaria. For commercial purposes, it is derived primarily from Gelidium amansii. In chemical terms, agar is a polymer made up of subunits of the sugar galactose.
