31. Which gland plays an important role in converting the food we eat into fuel for the body’s cells?
[A] Gonads
[B] Pancreas
[C] Pineal gland
[D] Adrenal glands
Show Answer
Correct Answer: B [Pancreas]
Notes:
The pancreas plays an important role in converting the food we eat into fuel for the body’s cells.
32. 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.
33. What is the function of glucagon?
[A] Affects RBC production
[B] Increases heart rate
[C] Lowers blood sugar levels
[D] Raises blood sugar levels
Show Answer
Correct Answer: D [Raises blood sugar levels]
Notes:
Raises blood sugar levels is the function of glucagon.
34. What disease is caused by Vibrio cholerae?
[A] Cholera
[B] Plague
[C] Tetanus
[D] Anthrax
Show Answer
Correct Answer: A [Cholera]
Notes:
Cholera disease is an acute diarrheal illness caused by Vibrio cholerae bacteria.
35. Which of the following relationship was not studied by Mendel?
[A] Flower colour and seed colour
[B] Height and seed colour
[C] Flower colour and shape of pollen grain
[D] Height and seed coat colour
Show Answer
Correct Answer: C [Flower colour and shape of pollen grain]
Notes:
Flower colour and shape of pollen grain relationship was not studied by Mendel.
36. Cuscuta is a ____:
[A] Complete stem parasite
[B] Partial root parasite
[C] Partial stem parasite
[D] Complete root parasite
Show Answer
Correct Answer: A [Complete stem parasite]
Notes:
Cuscuta (Dodder) is a genus of about 100-170 species of yellow, orange or red (rarely green) parasitic plants. Dodders are supremely adapted for a life of plunder and pillage. Reduced in form to scrambling and twining threads, they appear to be completely leafless, although closer inspection reveals tiny scale leaves pressed close to the stems. So, it is a stem parasite.
37. Which of the following processes are associated with plants during dark period?
[A] Respiration and transpiration
[B] Transpiration and conduction
[C] Photosynthesis and respiration
[D] Conduction and respiration
Show Answer
Correct Answer: D [Conduction and respiration]
Notes:
Conduction is the process by which vital nutrients are transported to the different parts of a plant. This process is independent of the light factor. Respiration process in plants is the intake of carbon-dioxide and exhales oxygen during the day as the plants gets energy through the photosynthesis process in which the carbon-dioxide is converted into sugars using the sun light energy, as this process uses carbon-dioxide and water, the resulting gas oxygen is given out as a waste product. During the night, as the photosynthesis process does not take place it exhales the carbon-dioxide itself.
38. The part of the stem where a leaf arises is known as ___:
[A] Carpel
[B] Bud
[C] Node
[D] Tuber
Show Answer
Correct Answer: C [Node]
Notes:
The leaves arise in the regions of the plant known as the plant nodes and are therefore the point of attachment of the leaves. The region of the plant between two nodes is known as the internode. The angle between the upper surface of the leaf and the stem from which it arises is known as the axil.
39. The vector of disease sleeping sickness is ____:
[A] Sand fly
[B] House fly
[C] Fruit fly
[D] Tsetse fly
Show Answer
Correct Answer: D [Tsetse fly]
Notes:
Human African trypanosomiasis, sleeping sickness, African lethargy, or Congo trypanosomiasis is a parasitic disease of people and animals, caused by protozoa of the species Trypanosoma brucei and transmitted by the tsetse fly. The tsetse fly is a large, brown, biting fly that serves as both a host and vector for the trypanosome parasites.
40. What is the main purpose of white blood corpuscles?
[A] To carry nutrients
[B] To give strength
[C] To combat infection
[D] To carry oxygen
Show Answer
Correct Answer: C [To combat infection]
Notes:
White blood cells (WBCs), also called leukocytes, are an important part of the immune system. These cells help fight infections by attacking bacteria, viruses, and germs that invade the body. White blood cells originate in the bone marrow, but circulate throughout the bloodstream. There are functionally two types of WBC, phagocytes and lymphocytes. Phagocytes engulf the germs and lymphocytes produce and release antibodies when required and as required by the body.