This set of Human Physiology Multiple Choice Questions & Answers (MCQs) focuses on “Cell and its Functions”.
1. Which of the following is the simplest amino acid?
Explanation: Glycine is the simplest amino acid. It has a single hydrogen atom as its side chain. It is a proteinogenic amino acid.
2. The animal cells are interconnected by _________
a) Cell wall
c) Plasma membrane
Explanation: Desmosomes are structure by which adjacent cells are attached, formed from protein plagues in cell membranes linked by filaments.
3. Polythene chromosomes are found due to?
Explanation: Endomitosis is a replication of chromosomes in the absence of cell or nuclear division, resulting in numerous copies within each cell, it occurs in salivary glands of Drosophila.
4. r-RNA is synthesized by __________
b) Golgi body
Explanation: Nucleolus is a small dense spherical structure in the nucleus of the cell. r-RNA is synthesized by Nucleolus.
5. Cristae are associated with?
Explanation: Cristae are associated with Mitochondria. It is a fold in the inner membrane of mitochondrion. It provides a large area for chemical reactions to occur.
6. Glycocalyx is associated with ___________
a) Cell wall
b) Plasma membrane
Explanation: Glycocalyx is associated with Plasma membrane. It is a glycoprotein and glycolipid covering the membrane. It is also known as peculiar matrix.
7. Histone octamere contains ____________
a) 8 types of histones
b) 5 types of histones
c) 6 types of histones
d) 8 histones of four different types
Explanation: Histone octamere is an 8 protein complex found at the centre of a nucleosome core particles. It consists of 2 copies of 4 core histone proteins.
8. Detoxification of lipid drugs and other harmful compounds in ER is carried out by?
a) Cytochrome P450
b) Cytochrome bf
c) Cytochrome D
d) Cytochrome F
Explanation: Cytochrome P450 enzymes function to metabolize potentially toxic compounds. There are 57 human genes coding for various cytochrome450.
9. Sodium and potassium pumps are examples of __________
a) Passive transport
c) Active transport
Explanation: Active transport is the movement of ions or molecules across a cell membrane into a region of higher concentration assisted by enzymes and requiring energy. Sodium and potassium pumps are examples of Active transport.
10. Cell theory is not applicable to _________
b) Micro organisms
Explanation: Cell theory is not applicable to a virus as a virus is considered living and nonliving.
11. Digestive enzymes are present in __________
Explanation: Lysosomes is an organelle in cytoplasm containing enzymes enclosed in the membrane. It contains hydrolytic enzymes that can breakdown biomolecules.
12. Which among the following is known as mitoplast?
a) Mitochondria without outer membrane
b) Mitochondria without inner membrane
c) Mitochondria without membranes
d) Another name for mitochondria
Explanation: Mitoplast is a mitochondrion that has been stripped of its outer membrane leaving inner membrane intact.
13. Cell drinking is ____________
Explanation: Cell drinking is Pinocytosis. It is ingestion of liquid into cell by the budding of small vesicles from the cell membrane.
14. Amyloplasts are articles storing _________
Explanation: Amyloplasts are articles storing starch. They are non pigmented organelles. They also convert starch back into sugar to release energy.
15. Centrioles take part in the formation of ___________
a) Cell plate
d) To start cell division
Explanation: Centrioles are a cylindrical structure composed of tubulin. Centrioles take part in the formation of Spindle.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy and Physiology, here is complete set of 1000+ Multiple Choice Questions and Answers.