31. In incomplete dominance__.
[A] Phenotype of both alleles is expressed
[B] Phenotype of only one allele is expressed
[C] Phenotype of neither of the alleles are expressed
[D] Phenotype of both alleles is partially expressed
Show Answer
Correct Answer: D [Phenotype of both alleles is partially expressed]
Notes:
In incomplete dominance, the phenotype of both alleles is partially expressed.
32. A rare way that a trait or disorder can be passed down through families is called which of the following?
[A] Sex-linked recessive
[B] Sex-linked dominant
[C] Autosomal dominant
[D] None of these
Show Answer
Correct Answer: B [Sex-linked dominant]
Notes:
A rare way that a trait or disorder can be passed down through families is called Sex-linked dominant. An abnormal gene on the X chromosome can cause sex-linked dominant disease.
33. An animal, plant, or micro-organism whose DNA has been altered using genetic engineering techniques is called?
[A] Genetically Matured Organisms
[B] Genetically Mental Organs
[C] Genetically Modified Organisms
[D] Genetically Mutant Organism
Show Answer
Correct Answer: C [Genetically Modified Organisms]
Notes:
An animal, plant, or micro-organism whose DNA has been altered using genetic engineering techniques is called Genetically Modified Organisms.
34. 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.
35. Among the given nutrients, milk is a poor source of which of the following?
[A] Carbohydrate
[B] Calcium
[C] Protein
[D] Vitamin C
Show Answer
Correct Answer: D [Vitamin C]
Notes:
Milk is a poor source of ascorbic acid (Vitamin C). It contains about 1 mg ascorbate per 100 g. Even the little Vitamin C is usually destroyed when the milk is heat treated. Milk as a complete food contains most of the esential nutrients except are vitamin C and iron.
36. Morphology of Chromosomes can be best studied at ___:
[A] Interphase
[B] Prophase
[C] Metaphase
[D] Zygotene
Show Answer
Correct Answer: C [Metaphase]
Notes:
The morphology of the chromosomes can be distinctly studied at metaphase stage of cell division because at this stage chromosomes are in highly condensed state (25 times of orginal size) and become thicker and well arranged.
37. To digest protein which of the enzyme is present in pancreatic juice?
[A] Pepsin
[B] Upes
[C] Trypsin
[D] Amaylase
Show Answer
Correct Answer: C [Trypsin]
Notes:
Trypsin is an enzyme that helps us digest protein. In the small intestine, trypsin breaks down proteins, continuing the process of digestion that began in the stomach. It may also be referred to as a proteolytic enzyme, or proteinase. Trypsin is produced by the pancreas in an inactive form called trypsinogen. The trypsinogen enters the small intestine through the common bile duct and is converted to active trypsin.
38. In which of the following parts of the human digestive system is the digestion of food completed?
[A] Small intestine
[B] Large intestine
[C] Mouth
[D] Stomach
Show Answer
Correct Answer: A [Small intestine]
Notes:
Small intestine has three parts – duodenum, jejunum, and ileum. The maximum digestion of food takes place in the duodenum. While the digestion of food is completed in jejunum. The maximum absorption of food takes place in ileum.
39. Bio-magnification implies ____:
[A] Food is magnified
[B] Living beings are magnified
[C] Light is magnified
[D] Toxic matters are magnified
Show Answer
Correct Answer: D [Toxic matters are magnified]
Notes:
Biomagnification is the sequence of processes in an ecosystem by which higher concentrations of a particular chemical such as the pesticide DDT, are reached in organisms higher up the food chain. It’s principal cause is eutrophication of stagnant water leading to the increase in BOD level. The some biomagnifcation has led to the ban on the use of DDT as a pesticide.
40. Mycobacterium leprae is a ____:
[A] Bacillus
[B] Spiral
[C] Coccus
[D] Spore
Show Answer
Correct Answer: A [Bacillus]
Notes:
Mycobacterium leprae is a bacillus (rod-shaped) bacterium that causes leprosy, also known as “Hansen’s disease”, which is a chronic infectious disease that damages the peripheral nerves and targets the skin, eyes, and muscles, upper respiratory tract, and nasal mucosa (lining of the nose).
