Biology Practice Question and Answer
8 Q: Who discovered the polio vaccine –
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5efc05b830aa3b4ee606c3c5- 1Robert koachfalse
- 2Edward Generefalse
- 3Alexander Flemmingfalse
- 4Jones Salktrue
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Answer : 4. "Jones Salk "
Explanation :
(D) Jonas Salk
The polio vaccine was developed by Dr. Jonas Salk. He and his team conducted extensive research in the 1950s, leading to the development of the inactivated polio vaccine (IPV), which became widely used for the prevention of polio. The vaccine was a significant breakthrough in medical science and played a crucial role in the global effort to eradicate polio.
Q: Hair is composed of protein called –
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5efc055230aa3b4ee606c2d6- 1keratintrue
- 2Caseinfalse
- 3Globulinfalse
- 4Mucinfalse
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Answer : 1. "keratin "
Explanation :
(A) Keratin
Hair is primarily composed of a protein called keratin. Keratin is a fibrous structural protein that forms the main component of hair, as well as nails and the outer layer of the skin. It provides strength and resilience to these structures. The other options—Casein, Globulin, and Mucin—are proteins found in other parts of the body and have different functions.
Q: A man, who does not know when to stop eating, is suffering from –
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5efc044d30aa3b4ee606c263- 1Diabetesfalse
- 2Anorexiafalse
- 3Bulimiatrue
- 4Hyperacidityfalse
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Answer : 3. "Bulimia "
Explanation :
(C) Bulimia
Bulimia nervosa is an eating disorder characterized by binge eating, which involves consuming large amounts of food in a short period of time, often with a lack of control. Individuals with bulimia then engage in compensatory behaviors, such as vomiting, excessive exercise, or fasting, to prevent weight gain. The person described in the question, who does not know when to stop eating, may be exhibiting characteristics of binge eating, which is a key feature of bulimia. Diabetes, anorexia, and hyperacidity are different health conditions and not typically associated with an inability to stop eating in the described manner.
Q: What is tissue?
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5ef58afce6dbc50ad18020af- 1Cells which are similar in origin, but dissimilar in form and function.false
- 2Cells which are dissimilar in origin, form and function.false
- 3Cells which are dissimilar in origin, but are similar in form and function.false
- 4Cells which are similar in origin, form and function.true
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Answer : 4. "Cells which are similar in origin, form and function."
Explanation :
(D) Cells which are similar in origin, form and function.
Tissues are groups of cells that are similar in origin, form, and function, working together to perform specific tasks in the body. Tissues can be classified into four main types: epithelial tissue, connective tissue, muscle tissue, and nervous tissue. Each type of tissue is composed of cells that share common characteristics and collaborate to carry out specialized functions within the body.
Q: ____forms a common passage for both urine and sperms in human males.
1502 15ef58768196e681f76d9bb83
5ef58768196e681f76d9bb83- 1Oviductfalse
- 2Urethratrue
- 3Ureterfalse
- 4Vas deferensfalse
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Answer : 2. "Urethra"
Explanation :
(B) Urethra
The urethra is the structure that forms a common passage for both urine and sperm in human males. It connects the urinary bladder to the external opening and serves as the channel through which urine and semen pass out of the body. The other options—Oviduct, Ureter, and Vas deferens—are not involved in the passage of urine in males. Oviduct is part of the female reproductive system, while the ureter carries urine from the kidneys to the bladder, and the vas deferens is a duct that transports sperm from the testes to the urethra.
Q: In which part of our body food gets absorbed?
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5ef58372196e681f76d9af83- 1Small Intestinetrue
- 2Large Intestinefalse
- 3Stomachfalse
- 4Liverfalse
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Answer : 1. "Small Intestine"
Explanation :
(A) Small Intestine
The absorption of nutrients from food primarily occurs in the small intestine. The small intestine is a long, coiled tube that follows the stomach in the digestive tract. It is the primary site for the absorption of nutrients such as sugars, amino acids, fatty acids, vitamins, and minerals into the bloodstream. The small intestine has specialized structures called villi and microvilli that increase its surface area, facilitating efficient absorption of nutrients. The large intestine primarily absorbs water and electrolytes but is not the main site for nutrient absorption. The stomach plays a role in digestion but is not a major site of nutrient absorption. The liver is involved in processing and storing nutrients but does not directly absorb them from the digestive tract.
Q: Which disease is caused by the deficiency of protein?
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5ef2f74910419f1973ec3cfa- 1Hypokalemiafalse
- 2Dermatosisfalse
- 3Goitrefalse
- 4Kwashiorkartrue
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Answer : 4. "Kwashiorkar"
Explanation :
(D) Kwashiorkor
Kwashiorkor is a disease caused by the deficiency of protein in the diet. It is a form of malnutrition that particularly affects children in regions where there is a lack of access to an adequate protein source. Symptoms of kwashiorkor include edema (swelling), stunted growth, and changes in skin and hair. The other options listed—Hypokalemia, Dermatosis, and Goitre—are not specifically caused by a deficiency of protein. Hypokalemia is a low potassium level, dermatosis refers to various skin disorders, and goitre is often associated with iodine deficiency leading to thyroid gland enlargement.
Q: An Active Chemical to remove mosquitoes is –
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5ef2ef2c81a47f2e7aebe114- 1Benzene Hexachlorophenefalse
- 2Allethrinstrue
- 3Atropinefalse
- 42 -Isopropoxiphimyalfalse
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Answer : 2. "Allethrins "
Explanation :
(B) Allethrins
Allethrins are active chemicals commonly used in mosquito repellents and insecticides to deter or eliminate mosquitoes. They belong to a class of synthetic pyrethroid insecticides, which are designed to mimic the insecticidal properties of pyrethrins, natural insecticides derived from chrysanthemum flowers. These chemicals are effective in repelling and killing mosquitoes and other insects. The other options (Benzene Hexachlorophene, Atropine, and 2-Isopropoxiphimyal) are not typically used for mosquito control.