Biology MCQs
31. What is the difference between compact bone and spongy bone?
[A] They have different bone marrow
[B] They are made of different materials
[C] They have different sizes of bone cells
[D] They have different arrangement of bone cells
Show Answer
Correct Answer: D [They have different arrangement of bone cells]
Notes:
The cells in the compact bone are packed closely together. This makes the bone very strong. For this reason, compact bone is located outside the bones. The spongy bone cells are dilated, which allows blood-filled canals to run through the spongy bone. The spongy bone is found at the end of long bones.
32. What is the function of a tendon?
[A] To link bones to bones
[B] To link muscles to bones
[C] To link muscles to ligaments
[D] To bind the cells in compact bone closer together
Show Answer
Correct Answer: B [To link muscles to bones]
Notes:
Tendons are strong and tough fibers. It connects muscles to bones. Muscles move bones by pulling on tendons. Tendons allow you to move the muscle to which it is attached. Tendons themselves do not stretch.
33. The splice of the joints are fibrous in nature in which there is no movement?
[A] tendons and tibia
[B] ligaments and femur
[C] diarthrosis
[D] synarthroses
Show Answer
Correct Answer: D [synarthroses]
Notes:
A synarthrosis is a fixed or almost immobile joint. Synarthrosis is a type of joint that allows no movement under normal circumstances.
34. Which of the following are also called natural killer cells?
[A] Monocytes
[B] Thrombocytes
[C] Lymphocytes
[D] Neutrophils
Show Answer
Correct Answer: C [Lymphocytes]
Notes:
Lymphocytes are also called natural killer cells and play a vital role in producing antibodies. Lymphocytes are of two types – B lymphocytes and T lymphocytes.
35. Serum differs from blood because it lacks__
[A] antibodies
[B] clotting factors
[C] albumins
[D] globulins
Show Answer
Correct Answer: B [clotting factors]
Notes:
Serum differs from blood because it lacks clotting factors. The serum is the liquid and solute component of the blood that does not play any role in clotting. This is blood plasma without fibrinogen.
36. What is the function of the Kidney?
[A] It cleans the blood by filtering it and removing waste products
[B] It regulates minerals in the body and produces hormones
[C] Both 1 and 2 are correct
[D] Only 1 is correct
Show Answer
Correct Answer: C [Both 1 and 2 are correct]
Notes:
Kidney cleans the blood by filtering it and removing waste products and regulating minerals in the body and producing hormones.
37. A hormone, which is released by the posterior pituitary:
[A] Oxytocin
[B] TSH
[C] ICSH
[D] Prolactin
Show Answer
Correct Answer: A [Oxytocin]
Notes:
A hormone, which is released by the posterior pituitary is Oxytocin. The posterior pituitary does not synthesize hormones, but it is able to store and release the two hormones.
38. Initiates and maintains milk production in breasts:
[A] Prolactin
[B] Renin and angiotensin
[C] Oxytocin
[D] Erythropoietin
Show Answer
Correct Answer: A [Prolactin]
Notes:
Prolactin initiates and maintains milk production in breasts. Prolactin secretes by the Pituitary gland.
39. Mastitis refers to which of the following?
[A] Inflammation of nephrons
[B] Inflammation of neurons
[C] Inflammation of Udders
[D] Inflammation of mast cells
Show Answer
Correct Answer: C [Inflammation of Udders]
Notes:
Mastitis refers to Inflammation of Udders. It is most often caused by infection with the Corynebacterium pyogenes bacterium in dry cows and pre-weaned heifers. Antibiotic treatment provides cure.
40. Bacteria protect themselves from viruses by fragmenting viral DNA?
[A] Ligase
[B] Endonuclease
[C] Exonuclease
[D] Gyrase
Show Answer
Correct Answer: C [Exonuclease]
Notes:
Bacteria protect themselves from viruses by fragmenting viral DNA with Exonuclease. Enzymes that work by cleaving one nucleotide at a time from the end (Exo) of the polynucleotide chain are called exonucleases.
