401. Proteins are made up of –

1. Sugars
2. Amino acids
3. Fatty acids
4. Nucleic acid

Option “2” is correct
Proteins are made up of smaller building blocks called amino acids, joined together in chains.
402. Which is the largest gland in human body?

1. Liver
2. Thyroid
3. Pituitary
4. Salivary gland

Option “1” is correct
Liver is the largest gland in human body. It is also the largest (internal) organ in our body and can weigh up to 1.5 kg for a human adult. That is, about 1/50th of the body weight is because of liver.
403. Which organ of human body secretes Insulin?

1. Pancreas
2. Kidney
3. Gall bladder
4. Liver

Option “1” is correct
Insulin is a hormone made by the pancreas that allows your body to use sugar (glucose) from carbohydrates in the food that you eat for energy or to store glucose for future use. Insulin helps keeps your blood sugar level from getting too high or too low.
404. Which of the following is an emergency hormone in humans?

1. Thyroxine
2. Insulin
3. Adrenaline
4. Progestrone

Option “3” is correct
Adrenaline is a hormone secreted by adrenal medulla during stress. This is called as emergency hormone because it initiates quick reation which makes the individual to think and respond quickly to the stress.
405. Webbed neck is a characteristic of-

1. Down’s syndrome
2. Turner’s syndrome
3. Klinefelter’s syndrome
4. Cri-du-chat syndrome

Option “2” is correct
Webbed neck is a characteristic of Turner’s syndrome.
406. Nitrogen fixation is a process of-

1. Assimilation of nitrate
2. Utilisation of nitrogen gas
3. Conversion of organic nitrogen to proteins
4. Conversion of molecular nitrogen to ammonia

Option “4” is correct
Nitrogen fixation is the process by which atmospheric nitrogen is converted either by a natural or an industrial means to a form of nitrogen such as ammonia.
407. A genetically engineered form of brinjal known as the BT-brinjal has been developed. The objective of this is –

1. To make it pest resistant
2. To improve its taste and nutritive value
3. To make it drought resistant
4. To make its shelf life longer

Option “1” is correct
A genetically engineered form of brinjal known as the BT-brinjal has been developed. The objective of this is to make it pest resistant. It is created by inserting a crystal protein gene from the soil bacterium Bacillus thuringiensis into the genome of various brinjal cultivars.
408. Bacteria was discovered by –

1. Antonie van Leeuwenhoek
2. Belarus
3. Hugo de Vries
4. Robert Brown

Option “1” is correct
Bacteria was discovered by Antonie van Leeuwenhoek.
409. Scurvy (bleeding of gums) is caused by deficiency of which vitamin?

1. Vitamin K
2. Vitamin B2
3. Vitamin C
4. Vitamin A

Option “3” is correct
Scurvy is caused due to deficiency of Vitamin C.
410. Achras sapote is the scientific name of-

1. Custard Apple
2. Gulmohar
3. Tamarind
4. Chiku

Option “4” is correct
Achras sapote is the scientific name of Chiku.
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48 thoughts on “Biology”

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