31. What is the function of the vena cava in the excretory system?
[A] form a network between the arteries to veins
[B] return deoxygenated blood from the body and the head to the heart
[C] Both 1 and 2
[D] None of these
Show Answer
Correct Answer: B [return deoxygenated blood from the body and the head to the heart]
Notes:
The vena cava returns deoxygenated blood from the body and head to the heart.
32. What are the symptoms of suffering from kidney disease?
[A] High blood pressure
[B] Respiration problem
[C] Swelling on the face, legs, etc.
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
There are no signs and symptoms of kidney disease in its early stages. Gradually if a person is suffering from this disease then he will have to face problems like high blood pressure, swelling in feet and face, shortness of breath, heart disease, diabetes, back pain, etc.
33. What part of the nephron is responsible for blood pressure-driven filtration?
[A] distal tubule
[B] loop of Henle
[C] glomerulus
[D] Urethra
Show Answer
Correct Answer: C [glomerulus]
Notes:
The glomerulus is a part of the nephron which is responsible for blood pressure-driven filtration.
34. Which is the Growth hormone inhibiting hormone?
[A] FSH
[B] TRH
[C] GHRH
[D] Somatostatin
Show Answer
Correct Answer: D [Somatostatin]
Notes:
Somatostatin works against Growth Hormone (GHRH), hence it is known as Growth Inhibiting Hormone. It consists of two peptides of 14 and 28 amino acids and is released from neurosecretory nerves.
35. Which gland is also known as the “third eye”?
[A] Adrenal glands
[B] Gonads
[C] Pineal gland
[D] None of these
Show Answer
Correct Answer: C [Pineal gland]
Notes:
The pineal gland is also known as the “third eye”. It is located between the two halves of the brain.
36. Which of the following is a type of inheritance?
[A] Complete dominance
[B] Sex-linked
[C] Incomplete dominance
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
The types of inheritance are as follows:
1. Complete dominance.
2. Incomplete dominance.
3. Co-dominance.
4. Sex-linked.
37. The bioethanol is subjected to rectification to remove?
[A] Sugar
[B] Enzymes
[C] Yeast
[D] Impurities
Show Answer
Correct Answer: D [Impurities]
Notes:
The bioethanol is subjected to rectification to Remove Impurities. Alcohol is made by microbial fermentation, mostly from carbohydrates produced in sugar- or starchy plants such as corn, sugarcane, sweet sorghum, or lignocellulosic biomass known as bioethanol.
38. Chicken Pox is caused by which micro-organism?
[A] Virus
[B] Bacteria
[C] Protozoa
[D] Fungus
Show Answer
Correct Answer: A [Virus]
Notes:
Chickenpox, also known as varicella, is a highly contagious infection caused by the varicella zoster virus. The disease results in a characteristic skin rash that forms small, itchy blisters, which eventually scab over. It is an airborne disease which spreads easily through the coughs and sneezes of an infected person.
39. The biological process in which both aerobes and anaerobes degrade organic matter is ____:
[A] Digesting
[B] Composting
[C] Manuring
[D] Nutrifying
Show Answer
Correct Answer: B [Composting]
Notes:
Composting is the depomposition of plant remains and other once-living materials to make an earthy, dark, crumbly substance that is excellent for enriching soil. It is the chief way to recycle wastes.
40. 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.
