31. The main function is to transport oxygen to and from various tissues and organs:
[A] Leucocytes
[B] Erythrocytes
[C] Platelets
[D] Plasma
Show Answer
Correct Answer: A [Leucocytes]
Notes:
The main function of Leucocytes is to transport oxygen to and from various tissues and organs.
32. Which does not act as a protective barrier for the surface of the body?
[A] Skin
[B] Mucus
[C] Gastric acid
[D] Salivary amylase
Show Answer
Correct Answer: D [Salivary amylase]
Notes:
Salivary amylase does not act as a protective barrier for the surface of the body.
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. Complete digestion of food takes place in:
[A] Stomach
[B] Small Intestine
[C] Pancreas
[D] Large Intestine
Show Answer
Correct Answer: B [Small Intestine]
Notes:
Complete digestion of food takes place in Small Intestine. The small intestine carries out most of the digestion process, absorbing almost all of the nutrients from foods into your bloodstream.
35. Melatonin hormone is secreted by which gland in the body?
[A] Pineal
[B] Thyroid
[C] Thalamus
[D] Pituitary
Show Answer
Correct Answer: A [Pineal]
Notes:
The pineal gland secretes the melatonin hormone, which controls the biological cycle (rise, sleep, awake, breath, heartbeat) inside the human body. It controls growth before puberty.
36. The male accessory glands generate fluid that nourishes the sperm called __
[A] semen
[B] seminal plasma
[C] spermatogonia
[D] testosterone
Show Answer
Correct Answer: B [seminal plasma]
Notes:
The male accessory glands generate fluid that nourishes the sperm called seminal plasma and is rich in fructose, calcium, and certain enzymes.
37. The population of the vagina with semen during coitus is called __.
[A] Insemination
[B] Outsemination
[C] Copulation
[D] Fertilization
Show Answer
Correct Answer: A [Insemination]
Notes:
Sperm along with other contents of semen populate the vagina. This process is called conception or Insemination.
38. Which of the following is totally impossible outcome of Mendel’s Experiment?
[A] 3 tall 1 short plant
[B] 24 tall and 8 short plants
[C] 8 tall and 0 short plants
[D] 4 tall plants and 1 medium height plant
Show Answer
Correct Answer: D [4 tall plants and 1 medium height plant]
Notes:
4 tall plants and 1 medium height plant is totally impossible outcome of Mendel’s Experiment. Gregor Mendel discovered the fundamental laws of inheritance through his work on pea plants. They concluded that genes come in pairs and are inherited as separate units, one from each parent.
39. What is thick vein present in the middle of the leaf called?
[A] Leaf venation
[B] Parallel venation
[C] Midrib
[D] Reticulate
Show Answer
Correct Answer: C [Midrib]
Notes:
A thick vein seen in the middle of the leaf is called the midrib. Pinnately veined leaves have one large central vein, called the midrib, which extends from the base of the blade to its tip. Other large veins branch off on each side of the midrib. The leaves of beech, birch, and elm trees have such a vein pattern.
40. Protein part of enzyme is known as ____:
[A] Isoenzyme
[B] Holoenzyme
[C] Apoenzyme
[D] All of the above
Show Answer
Correct Answer: C [Apoenzyme]
Notes:
Enzymes are defined as biological catalysts. Chemically all enzymes are globular proteins. Each enzyme catalyses only one chemical reaction. Protein part of enzyme is known as Apoenzyme. It forms an active enzyme system by combination with a coenzyme and determines the specificity of this system for a substrate.
