Answer The following questions as instructed :-
Q1. Explain the types of Plastids in brief.
Q2. Explain the functions and structure of Golgi bodies.
Q3. What is nucleoid?
Q4. What is the difference between plant cells and animal cells?
Q6. What are suicidal bags (lysosomes)?
Q7. What is the function of chromosomes?
Q8. Name the smallest cell in human body?
Q9. Which is the largest cell in human body?
Q10. Why Plant cells are are more rigid than animal cells?
Q11. Explain the process of osmosis in detail.
Q12. Draw and label diagrams of plant cell and animal cell.
Answers
ans.12
Answer:
1) Plastids are double membrane-bound organelles found inside plants and some algae, which are primarily responsible for activities related to making and storing food. Many plastids are photosynthetic, but some are not.
Some of the most common plastids include:
Chloroplasts
Chromoplasts
Gerontoplasts
and Leucoplasts
2)The Golgi body is an organelle found in most eukaryotic cells. ... The Golgi body has a number of functions, including sorting and processing proteins. Proteins are synthesized in the rough endoplasmic reticulum, then they travel to the Golgi body. While in the Golgi body, they are processed and sent throughout the cell.
3)The nucleoid (meaning nucleus-like) is an irregularly-shaped region within the cell of a prokaryote that contains all or most of the genetic material. In contrast to the nucleus of a eukaryotic cell, it is not surrounded by a nuclear membrane.
4)Plant and animal cells have several differences and similarities. For example, animal cells do not have a cell wall or chloroplasts but plant cells do. Animal cells are mostly round and irregular in shape while plant cells have fixed, rectangular shapes.
6)Lysosomes are known as suicide bags of the cell because they contain lytic enzymes capable of digesting cells and unwanted materials. When lysosomes burst, the lytic enzymes within the organelle spill all over the cell, rupturing the cell membrane or cell wall and inducing the death of the cell.
7)Chromosomes are thread-like structures present in the nucleus, which carries genetic information from one generation to another. They play a vital role in cell division, heredity, variation, mutation, repair and regeneration.
8)The smallest cell in the human body is only found in half of the population. It's the sperm cell, which is only found in males.
9)ovum
The smallest cell is the sperm cell and the largest cell is ovum in the human body. The sperm is a male reproductive cell and they are small in size. The sperm cell head measures about 4 mm in length, just slightly smaller than a red blood cell. The ovum also called egg cell is the reproductive cell in the female body.
10) The plant cell is rigid because it contains a cell wall that is absent in animal cells. The cell wall is made up of proteins, cellulose fiber and polysaccharides. The cell wall gives the plant cell its shape.
11)Osmosis is the movement of a solvent across a semipermeable membrane toward a higher concentration of solute (lower concentration of solvent). ... When a cell is submerged in water, the water molecules pass through the cell membrane from an area of low solute concentration to high solute concentration.
12)
Answer:
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