941. Blood fails to clot, while flowing in the blood vessel because of the presence of –

1. Heparin
2. Prothrombin
3. Haemoglobin
4. Hirudin

Option “1” is correct
Heparin is an anticoagulant (blood thinner) that prevents the formation of blood clots in blood vessel. Heparin is used to treat and prevent blood clots in the veins, arteries, or lung.
942. Which one of the following animals is Sanguinovorous?

1. Fruit fly
2. Mosquito
3. Housefly
4. Snail

Option “2” is correct
The animals which live on sucking blood from others organism body is called sanguinovorous. Mosquito is Sanguinovorous.
943. Which of the following blood cells is compulsory for blood coagulation?

1. Platelets
2. Red blood corpuscles
3. White blood corpuscles
4. Lymphocytes

Option “1” is correct
Platelets are tiny cell fragments that are found within our blood. Whenever there is a cut the activated platelets continue to arrive on the scene through the bloodstream. They stick together and become caught in the web of fibrin. Platelets are compulsory for blood coagulation.
944. The chemical used for destroying fungi in water tanks is –

1. Copper Sulphate
2. Magnesium Sulphate
3. Zinc Sulphate
4. Nitric Acid

Option “1” is correct

Copper Sulphate is a fungicide used to control bacterial and fungal diseases of fruit, vegetable, nut and field crops. It is chemical used for destroying fungi in water tanks.
945. Which of the following is a Parthenocarpic fruit?

1. Banana
2. Apple
3. Mulberry
4. Strawberry

Option “1” is correct
Parthenocarpy is the natural or artificially induced production of fruit without fertilization of ovules, which makes the fruit seedless. Banana is a parthenocarpic fruit.
946. Which of the following is a symptom of hemophilia?

1. Night Blindness
2. No clotting of Blood
3. Rickets
4. Loss of hemoglobin

Option “2” is correct
Hemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding.
947. The process by which blood is purified in human body is called-

1. Dialysis
2. Hemolysis
3. Osmosis
4. Paralysis

Option “1” is correct

Dialysis is a process for removing waste and excess water from the blood and is used primarily as an artificial replacement for lost kidney function in people with kidney failure. Dialysis filters out unwanted and fluids from the blood.
948. Major component of cotton is-

1. Protein
2. Fatty acid
3. Cellulose
4. Glycerene

Option “3” is correct
The chemical composition of linseed (cotton) is as follows- Cellulose – 91.00% and Water – 7.85%.
949. How many chromosomes are there in humans?

1. 36
2. 46
3. 56
4. 26

Option “2” is correct
In humans, each cell normally contains 23 pairs of chromosomes, a total of 46.
950. The strongest muscle in human body is found in-

1. Jaws
2. Thighs
3. Neck
4. Hands

Option “1” is correct
he strongest muscle based on its weight is the masseter. With all muscles of the jaw working together, it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.
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48 thoughts on “Biology”

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