561. Chlorophyll was first isolated and named by –

1. Caventou
2. Pelletier
3. Chlorophyll
4. Caventou and Pelletier

Option “4” is correct

Chlorophyll was first isolated and named by Joseph Bienaime Caventou and Pierre Joseph Pelletier in 1817.
562. How many layers does Human Skin have?

1. 5
2. 7
3. 11
4. 3

Option “4” is correct
Human skins have three layers- Epidermis, Dermis and Subcutaneous fat.
563. Allium Cepa is the scientific name of _____.

1. Carrot
2. Tomato
3. Potato
4. Onion

Option “4” is correct
Allium Cepa is the scientific name of onion.
564. DNA stands for _____.

1. Di Nucleic Acid
2. Deoxy Nucleic Acid
3. Diribonucleic Acid
4. Deoxyribonucleic Acid

Option “4” is correct
Deoxyribo nucleic acid (DNA) is a molecule that carries the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.
565. The Saliva helps in the digestion of –

1. Proteins
2. Starch
3. Fibres
4. Fats

Option “2” is correct
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine.
566. The tissue in man where no cell division occurs after birth is –

1. Epithelial
2. Nerves
3. Connective
4. Germinal

Option “2” is correct
In the nerve cell no division occurs after the birth.
567. The normal, RBC count in adult male is –

1. 4.7- 6.1 million
2. 7.5- 8.5 million
3. 2- 3 million
4. 1.5- 2.5 million

Option “1” is correct
The normal range in men is approximately 4.7 to 6.1 million cells/ul.
568. The branch of biology dealing with the study of cells is known as –

1. Cytology
2. Histology
3. Psychology
4. Physiology

Option “1” is correct
Cytology is a branch deals with study of cells.
569. Cod liver oil from fish is rich in which vitamin?

1. Vitamin C
2. Vitamin D
3. Vitamin A
4. Vitamin B

Option “2” is correct
Cod Liver Oil is high in omega 3 fatty acids and also provide an excellent source of vitamins A & D.
570. Yeast is a _____________.

1. Bacteria
2. Fungi
3. Algae
4. Bryophyte

Option “2” is correct
Yeasts are eukaryotic, single-celled microorganisms classified as members of the fungus kingdom.
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