31. A hormone that is synthesized from histidine amino acid:
[A] Histamine
[B] Epinephrine
[C] Norepinephrine
[D] Dopamine
Show Answer
Correct Answer: A [Histamine]
Notes:
A hormone that is synthesized from histidine amino acid is Histamine. While Epinephrine, norepinephrine, and dopamine are amine hormones, which are synthesized by modifying the amino acid tyrosine.
32. Which of the following are examples of harmful microbes?
[A] Streptococcus Pyogenes
[B] Escherichia Coli
[C] Pseudomonas Aeruginosa
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Streptococcus Pyogenes, Escherichia Coli, and Pseudomonas Aeruginosaare examples of harmful microbes. They can be transmitted through a variety of mediums in our bodies.
33. What is the renewable energy source produced by the breakdown of organic matter by some bacteria under anaerobic conditions called?
[A] Bioethanol
[B] Biogas
[C] Biofertilizer
[D] None of these
Show Answer
Correct Answer: B [Biogas]
Notes:
The renewable energy source produced by the breakdown of organic matter by some bacteria under anaerobic conditions is called Biogas. This is a mixture of methane, hydrogen, and carbon dioxide.
34. Golden rice variety is rich in which of the following?
[A] Vitamin C
[B] Β-carotene and ferritin
[C] Biotin
[D] Lysine
Show Answer
Correct Answer: B [Β-carotene and ferritin]
Notes:
The golden rice variety is rich in Β-carotene and ferritin. Beta carotene is a compound that gives vegetables their bright yellow, orange and red colours.
35. Which of the following is a product of biotechnology?
[A] Bacteria
[B] Skin
[C] Vaccine
[D] Plants
Show Answer
Correct Answer: C [Vaccine]
Notes:
The vaccine is a product of biotechnology. Vaccines prepare the immune system to recognize and attack invaders or antigens.
36. Carbon monoxide poisoning can be cured by
____:
[A] Drinking lemon-water
[B] Eating butter
[C] Exposing the affected person to fresh oxygen
[D] Consuming multi-vitamin tablet
Show Answer
Correct Answer: C [Exposing the affected person to fresh oxygen]
Notes:
Carbon monoxide poisoning can be cured by exposing the affected person to fresh oxygen. It is because CO posoning leads to oxygen starvation of body cells. This therapy involves breathing pure oxygen in a chamber in which the air pressure is about two to three times higher than normal. This speeds the replacement of carbon monoxide with oxygen in your blood. Hyperbaric oxygen therapy may be used in cases of severe carbon monoxide poisoning.
37. Which of the following diseases are not caused by smog?
[A] Breathing problem
[B] Throat cancer
[C] Skin cancer
[D] Rickets
Show Answer
Correct Answer: D [Rickets]
Notes:
Rickets is the softening and weakening of bones in children, usually because of an extreme and prolonged vitamin D deficiency. Vitamin D promotes the absorption of calcium and phosphorus from the gastrointestinal tract.
38. _____ is the study of the microanatomy of cells, tissues and organs as seen through a microscope:
[A] Entomology
[B] Paleontology
[C] Histology
[D] Lchthyology
Show Answer
Correct Answer: C [Histology]
Notes:
Histology is the study of the micro anatomy of cells, tissues, and organs as seen through a microscope. It examines the correlation between structure and fun-ction.Histology is the micro-scopic counterpart to gross anatomy which looks at larger structures visible without a microscope.
39. The number of chambers in a human heart is
____:
[A] Two
[B] Three
[C] Four
[D] Five
Show Answer
Correct Answer: C [Four]
Notes:
The human heart has four chambers, two superior atria and two inferior ventricles. The atria are the receiving chambers and the ventricles are the discharging chambers. The pathway of blood through the human heart consists of a pulmonary circuit and a systemic circuit.
40. The green colour of the leaves is due to the presence of ____:
[A] Proteins
[B] Carbohydrates
[C] Lipids
[D] Chlorophyll
Show Answer
Correct Answer: D [Chlorophyll]
Notes:
The green color in leaves is caused by the presence of a compound called “chlorophyll,” which the plant produces to do photosynthesis for capturing solar energy. The chlorophyll is green because it absorbs red and blue wavelengths of light — and so green is not absorbed and is reflected, making the plant look green to eyes.