NCERT Class VIII Science Solutions: Chapter 8-Cell Structure and Functions Part 2

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Question 4:

Which part of the cell contains organelles?

Answer:

Cytoplasm, gelatinous fluid inside a cell contains various organelles like mitochondria, Golgi bodies, ribosomes etc.

Question 5:

Make sketches of animal and plant cells. State three differences between them.

Answer:

Differences between Part, Plant Cell and Animal Cell
Differences between part, plant cell and animal Cell

Sl. No.

Part

Plant Cell

Animal Cell

1.

Cell wall

Present

Absent

2.

Centrosomes

Absent

Present & helps in cell division

3.

Plastids

Present

Absent

4.

Vacuole

Large Vacuole

Small Vacuole or Absent

As showing in image is a Plant cell and Animal cell

Plant Cell and Animal Cell

Question 6:

State the difference between eukaryotes and prokaryotes.

Answer:

  • Prokaryotes: The cells having nuclear material without nuclear membrane are termed as prokaryotic cells. The organisms with these kinds of cells are called prokaryotes.

Examples: Bacteria and blue green algae.

  • Eukaryotes: The cells having a well-organized nucleus with a nuclear membrane are termed as eukaryotic cells. The organisms with these kinds of cells are called eukaryotes.

Examples: Onion cells and cheek cells.

As showing in image is a Eukaryote and Prokaryote

Eukaryote and Prokaryote

Question 7:

Where are chromosomes found in a cell? State their function.

Answer:

Chromosomes are found in the nucleus of the cell. These carry genes and help in inheritance or transfer of characters from the parents to the offspring.

Chromosomes are thread-like organized structures located inside the nucleus of both animal and plant cells.

Each chromosome is made of the combination of proteins and deoxyribonucleic acid (DNA).

This diagram shows Chromosomes found in a cell

Chromosomes Found in a Cell

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