31. The undigested food stored in the liver in the form of carbohydrates is called __
[A] Pulp
[B] Glucose
[C] Glycogen
[D] Carbohydrate
Show Answer
Correct Answer: C [Glycogen]
Notes:
Glycogen is the undigested food stored in the liver in the form of carbohydrates.
32. What is the enzyme that breaks down lactose?
[A] Lipase enzymes
[B] Pepsin
[C] Amylase
[D] Lactase
Show Answer
Correct Answer: D [Lactase]
Notes:
Lactase is the enzyme that breaks down lactose.
33. The Leydig cells which are found in the human body are the secretory source of __
[A] Glucagon
[B] Intestinal mucus
[C] Androgens
[D] Progesterone
Show Answer
Correct Answer: C [Androgens]
Notes:
The Leydig cells which are found in the human body are the secretory source of Androgens.
34. What happens when the luteinizing hormone increases?
[A] stimulates contraction of uterus
[B] ovaries to release eggs
[C] maintains milk production in breasts
[D] All of the above
Show Answer
Correct Answer: B [ovaries to release eggs]
Notes:
Ovaries release eggs when the luteinizing hormone increases.
35. Ovum receives the sperm in the region of__
[A] Animal pole
[B] the Equator
[C] Vegetal pole
[D] Pigmented area
Show Answer
Correct Answer: C [Vegetal pole]
Notes:
Ovum receives the sperm in the region of the Vegetal pole. An embryo is divided into two hemispheres: the animal ovule and the vegetative pole within a blastula.
36. The root nodules for nitrogen fixation of a non-legume tree are?
[A] Frankia
[B] Rhizobium
[C] Azotobacter
[D] Thiobacillus
Show Answer
Correct Answer: A [Frankia]
Notes:
The root nodules for nitrogen fixation of a non-legume tree are Frankia. It is a genus of nitrogen-fixing bacteria that live in symbiosis with actinorhizal plants.
37. Which inhibits the translation of mRNA?
[A] increase
[B] knock out
[C] clearing
[D] silencing
Show Answer
Correct Answer: D [silencing]
Notes:
The one that inhibits the translation of mRNA is silencing. It controls the expression of a gene by inhibiting its expression.
38. Which of the following is a mobile genetic element?
[A] virus
[B] bacteria
[C] Transposons
[D] insertion sequence
Show Answer
Correct Answer: C [Transposons ]
Notes:
A transposon is a mobile genetic element. This is also known as jumping genes. A type of genetic material that can move around within a genome is called a mobile genetic element.
39. Which organism’s plasmid was first used to construct recombinant DNA?
[A] Cyanobacteria
[B] Bacillus subtilis
[C] Saccharomyces cerevisiae
[D] Salmonella typhimurium
Show Answer
Correct Answer: B [Bacillus subtilis]
Notes:
Bacillus subtilis organism’s plasmid was first used to construct recombinant DNA.
40. Saprophytes are the organisms which depend for food on
____:
[A] Inorganic chemical compounds
[B] Living plants
[C] Living animals
[D] Dead and decaying material
Show Answer
Correct Answer: D [Dead and decaying material]
Notes:
Saprophytes are the organisms which depend for food on dead and decaying material. They secrete digestive substances into the surrounding environment and break down the organic matter into simpler substances. The nutrients thus produced are absorbed directly through the cell membranes of the organisms.
