brodidit for students
Cell biology
Class 11 · Biology · 9 questions
Name: ____________________ Date: ____________
The fluid mosaic model describes the structure of the:
- A Cell wall
- B Cell membrane
- C Nucleus
- D Mitochondrion
Movement of water across a semipermeable membrane is called:
- A Diffusion of solutes only
- B Phagocytosis
- C Osmosis
- D Active transport
Active transport requires:
- A Only heat
- B No energy
- C Only light
- D ATP
Which organelle contains digestive enzymes?
- A Vacuole only
- B Lysosome
- C Ribosome
- D Centriole
Rough endoplasmic reticulum is rough because of attached:
- A Lipids
- B Ribosomes
- C Chloroplasts
- D Mitochondria
A cell placed in a hypotonic solution will:
- A Divide
- B Shrink
- C Swell
- D Stay the same
The cell membrane is mainly made of:
- A Starch
- B Cellulose
- C Chitin
- D Phospholipids and proteins
The site of protein modification and packaging is the:
- A Ribosome
- B Golgi apparatus
- C Lysosome
- D Nucleolus
Which organelle has its own DNA?
- A Mitochondrion
- B Ribosome
- C Golgi body
- D Lysosome
Answer key
1. B, 2. C, 3. D, 4. B, 5. B, 6. C, 7. D, 8. B, 9. A
It shows a phospholipid bilayer with proteins embedded in it.
Osmosis is the diffusion of water across a selectively permeable membrane.
It moves substances against a concentration gradient and uses ATP.
Lysosomes digest worn out parts and engulfed material.
Ribosomes on its surface give it a rough appearance.
Water enters the cell, so it swells.
This is the fluid mosaic model.
The Golgi body modifies and packages proteins.
Mitochondria and chloroplasts contain DNA.