can anyone pls tell me imp ques for the chap Fundamental units of Life...
It's Urgent..Pls
Answers
Answer:
Important Fundamental units of Life...
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.
If you want questions with answers means :
Question 1.
Plasma membrane is made up of which two components?
Answer:
Plasma membrane is made up of lipids and proteins.
Question 2.
What is hypotonic solution?
Answer:
A solution having solute concentration lower than that of the cell sap is called hypotonic solution.
Question 3.
What is hypertonic solution?
Answer:
A solution having solute concentration higher than that of the cell sap is called hypertonic solution.
Question 4.
What is isotonic solution?
Answer:
A solution having solute concentration same as that of the cell sap is called isotonic solution.
Question 5.
Cell wall is made up of which component?
Answer:
Cell wall is made up of cellulose.
Question 6.
Give an example of unicellular organism.
Answer:
Amoeba, Bacteria, Paramecium. (Any one)
Question 7.
Give an example of multicellular organism.
Answer:
Fungi, plants, animals. (Any one)
Question 8.
What is active transport?
Answer:
The movement of molecules across a membrane in cells against a concentration gradient with the help of ATP units is called active transport.
Question 9.
What is the intracellular source of digestive enzyme?
Answer:
Lysosome
Question 10.
What is endocytosis?
Answer:
Endocytosis is the ingestion or engulfment of food and other material by folding of the plasma membrane it as seen in Amoeba.
Question 11.
Where are genes located?
Answer:
Genes are located on chromosomes in the nucleus.
Question 12.
Name two structures found in plant cells but not in animal cells.
Answer:
Cell wall and chloroplast
Question 13.
Name two structures found in animal cells but not in plant cells.
Answer:
Lysosomes and centrioles
Question 14.
Which organelle is involved in the formation of lysosomes?
Answer:
Golgi apparatus
Question 15.
What is the outermost layer found in animal cells?
Answer:
Plasma membrane
Question 16.
What is the outermost layer found in the plant cell?
Answer:
Cell wall
Question 17.
Which organelle is the storage sac of solid and liquid materials?
Answer:
Vacuoles
Question 18.
Which organelle serves as a channel for transport of materials between cytoplasm and nucleus?
Answer:
Endoplasmic reticulum
Question 19.
What is microscope?
Answer:
Microscope is an optical instrument consisting of a lens or combination of lenses which renders minute objects distinctly visible.
Question 20.
Why is light microscope called a compound microscope?
Answer:
Light microscope is called a compound microscope because it consists of two or more lens systems.
Question 21.
Which organelle is associated with ribosome formation?
Answer:
Nucleolus
Question 22.
What are chromosomes made up of?
Answer:
Chromosomes are made up of DNA and protein.
Question 23.
Define plasmolysis.
Answer:
It is the shrinkage of cytoplasm due to loss of water when kept in a hypertonic medium.
Question 24.
What is a nucleoid?
Answer:
The undefined nuclear region in the cytoplasm of prokaryotes is known as nucleoid.
Question 25.
Which organelles other than nucleus contain DNA?
Answer:
Mitochondria and plasmids contain DNA.
Question 26.
Name the only cell organelle seen in prokaryotic cell.
Answer:
Ribosomes
Question 27.
Which microorganisms can be made into crystal?
Answer:
Viruses
Question 28.
Which organelle detoxify many poisons and drugs in a cell?
Answer:
Peroxisome
Question 29.
Name a cell organelle which is non-membranous. [NCERT Exemplar]
Answer:
Ribosome.
Question 30.
Define diffusion.
Answer:
Movement of molecules from a region of higher concentration to a region of lower concentration is called diffusion.