1. Which among the following diseases is characterized by “complete loss of memory”?
[A] Amnesia
[B] Schizophrenia
[C] Alzheimer’s disease
[D] Parkinson’s disease
Show Answer
Correct Answer: A [Amnesia ]
Notes:
Amnesia refers to a loss of memory due to illness, injury, drug abuse or other causes.
2. Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are _________ ?
[A] Proteins
[B] Lipids
[C] glycoproteins and gycolipids
[D] None of the above
Show Answer
Correct Answer: C [glycoproteins and gycolipids]
Notes:
Cell membranes contain some biochemicals which are responsible for cell recognition and adhesion. They are glycoproteins and glycolipids. Lipid and proteins on the cell membrane surface often have short carbohydrate chains protruding out from the cell surface which are known as glycolipids and glycoproteins.
3. Calcium is required in plants in the formation of which of the following ?
[A] Cell Membrane
[B] Cell wall
[C] Cholorophyll
[D] None of the above
Show Answer
Correct Answer: B [Cell wall]
Notes:
Calcium is required in plants in the formation of cell wall. It is a structural layer surrounding some types of cells, just outside the cell membrane. The cell wall can be tough, flexible, and sometimes rigid also.
4. The blood pressure is denoted as following?
[A] Systolic Pressure / Diastolic Pressure
[B] Diastolic Pressure / Systolic Pressure
[C] Venous Pressure / Systolic Pressure
[D] Systolic Pressure / Pulse Pressure
Show Answer
Correct Answer: A [Systolic Pressure / Diastolic Pressure]
Notes:
Blood Pressure is expressed in two numbers. The higher number is known as Systolic Pressure, or the amount of force (as measured in millimetres of mercury) that is exerted against the artery walls during a heartbeat (contraction). The lower number in the Diastolic pressure, which does the force exist while the heart is resting between beats.
5. Cobalt is a component of which of the following Vitamins?
[A] Vitamin A
[B] Vitamin D
[C] Vitamin E
[D] Vitamin B12
Show Answer
Correct Answer: D [Vitamin B12]
Notes:
Cobalt is a component of Vitamin B12. Vitamin B12 is also known as also known as cobalamin, is an important water-soluble vitamin which is used in the production of red blood cells and DNA.
6. Overdose of antibiotics will cause the suppression of synthesis of which among the following vitamins in human body?
[A] Vitamin A
[B] Calciferol
[C] Vitamin K
[D] Biotin
Show Answer
Correct Answer: D [Biotin]
Notes:
Overdose of antibiotics will cause the suppression of synthesis biotin in human body. Biotin is also known as vitamin H, vitamin B₇ or vitamin B₈ and is involved in a wide range of metabolic processes, primarily related to the utilization of fats, carbohydrates, and amino acids.
7. Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on which among the following?
[A] Mechanisms of the action of hormones
[B] Chemical Structure of antibodies
[C] Interpretation of the genetic code
[D] Structural and functional organization of the cell
Show Answer
Correct Answer: C [Interpretation of the genetic code]
Notes:
Late Hargobind Khorana had received Nobel Prize in physiology in 1968, for work on interpretation of the genetic code. Har Gobind Khorana was an Indian American biochemist.
8. Stripes can be seen over the body of many animals. Which of the following indication is given by the stripes?
[A] Mating habit
[B] Food habit
[C] Cave dwelling
[D] Matching of skin colour with surroundings
Show Answer
Correct Answer: D [Matching of skin colour with surroundings]
Notes:
Some animals have stripes on their back because of the Camouflage Effect. Camouflage effect refers to combination of different colours or materials in order to make animals or objects hard to see or to disguise oneself in the surrounding. Striped Animals can easily hunt other animals by disguising themselves in the surrounding and making it hard for other animals to see.
9. Which of the following is not an element of the bone?
[A] Calcium
[B] Phosphorus
[C] Carbon
[D] Oxygen
Show Answer
Correct Answer: C [Carbon]
Notes:
Bones consist of living cells embedded in a mineralized organic matrix. This matrix consists of organic components, mainly type I collagen – “organic” referring to materials produced as a result of the human body – and inorganic components, primarily hydroxyapatite and other salts of calcium and phosphate.
10. Fertility of soil can be improved by which of the following methods?
[A] Removing dead earthworms
[B] Adding dead earthworms
[C] Adding living earthworms
[D] Removing living earthworms and adding dead earthworms
Show Answer
Correct Answer: C [Adding living earthworms]
Notes:
Worms help to increase the amount of air and water that gets into the soil. They break down organic matter, like leaves and grass into things that plants can use. When they eat, they leave behind castings that are a very valuable type of fertilizer. Earthworms are like free farm help.
