31. Which among the following is correct about Saliva of a Healthy Human?
[A] It is slightly acidic
[B] It is slightly saline
[C] It is slightly alkaline
[D] It is neutral
Show Answer
Correct Answer: C [It is slightly alkaline]
Notes:
pH stands for potential hydrogen. It is used to describe the chemical acidity level vs. alkalinity level of a substance. The pH of Healthy human saliva is slightly alkaline and in the range of 6.2 to 7.6.
32. In which of the following branches of science study of functions, characteristics, and phenomena observed in the living world and the application of this knowledge to world of machine is studied?
[A] Biometry
[B] Bionics
[C] Bionomy
[D] Bionomy
Show Answer
Correct Answer: B [Bionics]
Notes:
Bionics or biologically inspired engineering is the application of biological methods combined with engineering. It is that branches of science which studies the functions, characteristics, and phenomena observed in the living world and the application of this knowledge to world of machine.
33. Which among the following is not a function of Sympathetic nerves in Autonomic nervous system?
[A] Enhancing the heart beats
[B] constricting the blood vessels
[C] dilate pupils
[D] contract urinary bladder
Show Answer
Correct Answer: D [contract urinary bladder]
Notes:
contract urinary bladder is a function of Parasympathetic nerves. Sympathetic nerves relax urinary bladder.
34. Which among the following is correct about Blood Group B ?
[A] It has B antigen on its red cells and Anti A antigen in its plasma
[B] It has B antigen on its red cells and Anti B antigen in its plasma
[C] It has no antigens on its red cells but, anti A antigen in its plasma
[D] It has B antigen on its red cells but no antigen in its plasma
Show Answer
Correct Answer: A [It has B antigen on its red cells and Anti A antigen in its plasma]
Notes:
The red blood cells have both A and B antigens, but the plasma does not contain anti-A or anti-B antibodies. It has B antigen on its red cells and Anti A antigen in its plasma.
35. Who among the following scientists is known for developing techniques for DNA fingerprinting and DNA profiling which are now used all over the world in forensic science to assist police detective work?
[A] Vernon Heywood
[B] Patrick Laidlaw
[C] Alec Jeffreys
[D] Heinz Wolff
Show Answer
Correct Answer: C [Alec Jeffreys]
Notes:
Alec Jeffreys scientists is known for developing techniques for DNA fingerprinting and DNA profiling which are now used all over the world in forensic science to assist police detective work.
36. Who among the following were awarded Nobel Prize in 1958 for One Gene One Enzyme Concept?
[A] Landsteiner & Weiner
[B] Avery, Mccleod and mc Carthy
[C] Jacob & Wollman
[D] George Beadle and Edward Tatum
Show Answer
Correct Answer: D [George Beadle and Edward Tatum]
Notes:
George W. Beadle (1903-1989) and Edward L. Tatum (1909-1975) show how genes direct the synthesis of enzymes that control metabolic processes. George Beadle and Edward Tatum were awarded Nobel Prize in 1958 for One Gene One Enzyme Concept.
37. Which among the following is a correct definition of Hematocrit?
[A] proportion of blood volume that is occupied by red blood cells
[B] proportion of blood volume that is occupied by white blood cells
[C] proportion of blood volume that is occupied by Leucocytes and Thromobocytes
[D] proportion of blood volume that is occupied by plasma
Show Answer
Correct Answer: A [proportion of blood volume that is occupied by red blood cells]
Notes:
Hematocrit levels are used in doping tests of Athletes , (the RBCs are carriers of Oxygen). hematocrit levels also denotes the blood iron. hematocrit levels of 38 or higher are normally suitable for the donors to donate their blood. Here please note that sometimes its is asked in exams about the ion which can help better in blood coagulation and normally options given are Ca, Na, K & Fe+3. The obvious answer is Fe+3.
38. What is the correct name of premature death of cells and living tissue?
[A] Neutrophilia
[B] Necrosis
[C] Neoplasia
[D] Nephrosis
Show Answer
Correct Answer: B [Necrosis]
Notes:
Necrosis is the name of premature death of cells and living tissue. It refers to the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.
39. Which among the following correctly refers to Ischemia?
[A] restriction in blood supply due to factors in the blood vessels
[B] Abrupt fall in the blood Pressure
[C] necrosis in a blood vessel due to a local lack of oxygen
[D] condition of severely deficient supply of oxygen to the body
Show Answer
Correct Answer: A [restriction in blood supply due to factors in the blood vessels]
Notes:
Restriction in blood supply due to factors in the blood vessels refers to Ischemia. Ischemia can have causes that aren’t due to underlying disease some of which include extreme exercise, cold exposure or tourniquet.
40. Which of the following part of the body stores Vitamin A, Vitamin D as well as Vitamin B12?
[A] Brain
[B] Liver
[C] Pancreas
[D] Red Blood Cells
Show Answer
Correct Answer: B [Liver]
Notes:
Liver stores Vitamin A, Vitamin D as well as Vitamin B12. The bile juice secreted during digestion is essential for absorbing them so that the body can use them.
