31. The outermost layer of the ovary is made up of ___.
[A] simple cuboidal cells
[B] stereocilia
[C] stroma
[D] cilia
Show Answer
Correct Answer: A [simple cuboidal cells]
Notes:
Ovarian or germinal epithelium is the outermost layer of the ovary composed of simple cuboidal cells. It is actually a modified visceral peritoneum.
32. Which two traits characterize a single gene?
[A] Seed colour and shape
[B] Flower colour and position
[C] Colour of flower and seed coat
[D] Height and colour of seed
Show Answer
Correct Answer: C [Colour of flower and seed coat]
Notes:
The Colour of the flower and seed coat are the two traits that characterize a single gene.
33. Mendel did not give __.
[A] Concept of genes
[B] Concept of inheritance
[C] Concept of dominance
[D] Concept of chromosomes
Show Answer
Correct Answer: D [Concept of chromosomes]
Notes:
Mendel did not give the Concept of chromosomes. The chromosomal theory of inheritance was given by Boveri and Sutton.
34. A trait produced by the effect of a gene or an allele is called__
[A] Oncogenic Trait
[B] Monogenic trait
[C] Polygenic trait
[D] None of these
Show Answer
Correct Answer: B [Monogenic trait]
Notes:
A trait produced by the effect of a gene or an allele is called a Monogenic trait.
35. A process in which earthworms convert organic waste into manure rich in high nutritional content is called
[A] Farmyard manure
[B] Bio Compost
[C] Vermicomposting
[D] Green manure
Show Answer
Correct Answer: C [Vermicomposting]
Notes:
A process in which earthworms convert organic waste into manure rich in high nutritional content is called Vermicomposting.
36. Which of the following organism can transfer ‘T-DNA’ within plants?
[A] Agrobacterium tumifaciens
[B] E.coli
[C] Aspergillus niger
[D] S. typhi
Show Answer
Correct Answer: A [Agrobacterium tumifaciens]
Notes:
Agrobacterium tumefacient organism can transfer ‘T-DNA’ within the plant. It infects dicot plants.
37. Who among the following invented Bt cotton?
[A] Ernst Berliner
[B] James Black
[C] Erwin Chargaff
[D] Rachel Carson
Show Answer
Correct Answer: A [Ernst Berliner]
Notes:
Ernst Berliner invented Bt cotton. Genetically modified by the insertion of one or more genes from a common soil bacterium, Bacillus thuringiensis, known as Bt cotton.
38. Which of the following prevents bleeding of gums?
[A] Nicotinamide
[B] Ascorbic acid
[C] Thiamine
[D] Vitamin B
Show Answer
Correct Answer: B [Ascorbic acid]
Notes:
Vitamin C (Ascorbic acid) cures scurvy, which can cause abnormal gum bleeding. Excellent sources include citrus fruits such as oranges, lemons, limes, and grapefruits. Researchers examined 15 published studies involving 1,140 healthy people as well as data on 8,210 people from the CDC’s Health and Nutrition Examination Survey. They found that low vitamin C levels in the bloodstream were associated with an increased risk for gum bleeding with gentle probing.
39. Cutaneous membrane is the technical term for which tissue or organ?
[A] Skin
[B] Intestines’
[C] Nervous Tissues
[D] Adipose Tissue
Show Answer
Correct Answer: A [Skin]
Notes:
The skin is the soft outer covering of vertebrates that guards the underlying muscles, bones, ligaments, and internal organs. The cutaneous membrane is the technical term for our skin. The skin’s primary role is to help protect the rest of the body’s tissues and organs from physical damage such as abrasions, chemical damage such as detergents, and biological damage from micro organisms. Our skin is made of three general layers. In order from most superficial to deepest they are the epidermis, dermis, and subcutaneous tissue.
40. Which of the following creatures is oviparous?
[A] Frog
[B] Rabbit
[C] Mouse
[D] Squirrel
Show Answer
Correct Answer: A [Frog]
Notes:
Oviparous is a zoological term that refers to animals that lay eggs which then hatch externally. Oviparous animals may fertilize their eggs either externally or internally. Frogs are oviparous since they lay eggs, which then develop outside of the mother. Ovoviviparous animals are relatively uncommon, sharks are most well-known.
