The Fundamental Unit of Life quiz

The cell was discovered by:

The powerhouse of the cell is the:

The cell wall of plants is mainly made of:

Which organelle is known as the suicide bag of the cell?

The movement of water through a selectively permeable membrane is called:

Ribosomes are the site of:

A cell placed in a hypertonic solution will:

Prokaryotic cells lack:

Plastids containing chlorophyll are called:

Which cell organelles have their own DNA?

Why is the plasma membrane called a selectively permeable membrane? (2 marks)

How does Amoeba obtain its food? Name the process. (2 marks)

What happens when dried raisins are placed in water? Why? (2 marks)

What are chromosomes? What are they made of? (2 marks)

What is the function of the smooth endoplasmic reticulum? (2 marks)

Why are vacuoles large in plant cells? (2 marks)

What is a nucleoid? (2 marks)

Name two functions of the Golgi apparatus. (2 marks)

Why are cells called the structural and functional units of life? (2 marks)

Differentiate between mitosis and meiosis on two points. (2 marks)

The diameter of a cell seen under a microscope of total magnification 400x is 20 mm in the image. Find the actual diameter in micrometres. (3 marks)

A yeast cell divides every 90 minutes. Starting with 10 cells, how many will there be after 6 hours? (3 marks)

Raisins of total mass 25 g are soaked in water and their mass becomes 32 g. Find the percentage increase in mass and explain the process. (3 marks)

A human body has about 37 trillion cells. If red blood cells make up about 70% of these by number, find the approximate number of red blood cells. (3 marks)

A cell has 8 chromosomes. How many chromosomes will there be in the daughter cells after (i) one mitotic division (ii) meiosis? How many cells are formed in each case? (3 marks)

Read the passage and answer the questions. A student places a peeled egg in water and another in concentrated salt solution. After some time, the egg in water swells and the one in salt solution shrinks. (i) Why did the egg in water swell? (ii) Why did the egg in salt solution shrink? (iii) Name the process involved. (5 marks)

Read the passage and answer the questions. A Rhoeo leaf peel was placed in strong salt solution and observed under a microscope. The contents of the cells shrank away from the cell wall. (i) What is this phenomenon called? (ii) Why did it happen? (iii) What will happen if the peel is then placed in water? (5 marks)

Read the passage and answer the questions. When a cell is damaged, its lysosomes may burst, and their enzymes digest the cell itself. Lysosomes also destroy worn-out organelles and foreign particles. (i) Why are lysosomes called suicide bags? (ii) What do lysosomes contain? (iii) In which part of the cell are lysosome enzymes made? (5 marks)

Read the passage and answer the questions. Leaves of plants are green, while flowers and fruits often show bright colours. Potato tubers store starch. (i) Name the plastids responsible for green colour. (ii) Name the plastids that give colour to flowers and fruits. (iii) Name the plastids that store starch. (5 marks)

Read the passage and answer the questions. In 1665, Robert Hooke looked at a thin slice of cork through a self-designed microscope and saw a honeycomb-like structure of small compartments. (i) What did he call these compartments? (ii) Were these cells living or dead? Why? (iii) Who first observed living cells? (5 marks)

Draw a labelled diagram of a plant cell. Describe the functions of any four organelles. (6 marks)

Draw a labelled diagram of an animal cell. Explain how it differs from a plant cell. (6 marks)

Draw a labelled diagram of a prokaryotic cell such as a bacterium. Compare it with a eukaryotic cell. (6 marks)

Draw a labelled diagram of the experiment showing osmosis using potato cups or an egg. Explain the observations. (6 marks)

Draw diagrams showing the stages of mitosis in an animal cell. Explain the importance of mitosis and meiosis. (6 marks)