31. Which of the following is not a female hormone?
[A] Oxytocin
[B] Testosterone
[C] Estrogen
[D] Progesterone
Show Answer
Correct Answer: B [Testosterone]
Notes:
The testes produce testosterone which is responsible for male sexual characteristics.
32. 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.
33. Which of the following is known as the “Father of Genetics”?
[A] Morgan
[B] Mendel
[C] Watson
[D] Bateson
Show Answer
Correct Answer: B [Mendel]
Notes:
Mendel is known as the “Father of Genetics”.
34. The term biomass most often refers to which of the following?
[A] Inorganic matter
[B] Organic matter
[C] Chemicals
[D] Ammonium compounds
Show Answer
Correct Answer: B [Organic matter]
Notes:
The term biomass most often refers to Organic matter. Organic material is that was alive and is now in or on the soil.
35. Which of the following is used as a tool to insert genes into bacteria to stimulate the production of therapeutic proteins such as human insulin?
[A] Plasmid
[B] Nitrogenous base
[C] Bacteria
[D] RNA
Show Answer
Correct Answer: A [Plasmid]
Notes:
A plasmid is used as a tool to insert genes into bacteria to stimulate the production of therapeutic proteins such as human insulin.
36. Which of the following is the sequence of DNA from where replication begins?
[A] selectable marker
[B] the origin of replication
[C] ter sequence
[D] genetic sequence
Show Answer
Correct Answer: B [the origin of replication]
Notes:
The origin of replication is a sequence of DNA on which replication is initiated on a chromosome, plasmid or virus.
37. Which of the following is an enzyme that cleaves proteins?
[A] protease
[B] RNase
[C] lipase
[D] Dnase
Show Answer
Correct Answer: A [protease]
Notes:
Protease is an enzyme that cleaves proteins. These enzymes are made by animals, plants, fungi, and bacteria.
38. 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.
39. A cross between homozygous recessive and heterozygous plant is
____:
[A] Back cross
[B] Test cross
[C] Monohybrid cross
[D] Dihybrid cross
Show Answer
Correct Answer: B [Test cross]
Notes:
A cross between a homozygous plant with recessive traits and a heterozygous plant is known as a test cross. A test cross is a valuable tool in predicting the genotype of the organism in question. In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype). Test cross is done to determine the genotype of an F2 generation plant, showing dominant characteristics. In the test cross, an F2 plant that shows the dominant trait is crossed with the homozygous recessive.
40. Which of the following are warm-blooded animals?
[A] Whales
[B] Draco
[C] Alytes
[D] Whale Sharks
Show Answer
Correct Answer: A [Whales]
Notes:
Animals, such as mammals and birds, that maintain a constant body temperature regardless of the temperature of the surroundings are called warm blooded. These include birds and mammals. Whales are aquatic mammals hence, being mammal, they are warm blooded. The have a thick layer of fats called blubber underneath their skin to maintain temperature even in cold water of oceans.