Expert Physics Tutoring

MS1 (1 mark):

A single-celled organism that lacks a nucleus and membrane-bound organelles.

MS2 (2 marks):

- Controls the movement of substances into and out of the cell (1)

- Allows the cell to regulate its internal environment (1)

MS3 (3 marks):

- Site of cellular respiration (1)

- Produces ATP, the cell's energy currency (1)

- Double membrane structure: outer and inner membranes (1)

MS4 (1 mark):

Chloroplasts

MS5 (2 marks):

- Viruses are not cells (1)

- Viruses contain only DNA or RNA (1)

MS6 (4 marks):

- Phagocytosis (1)

- Antitoxin production (1)

- Antibody production (1)

- Ability to recognize and bind to specific pathogens (1)

MS7 (2 marks):

- Site of protein synthesis (1)

- Made of RNA and proteins (1)

MS8 (3 marks):

- Binary fission occurs in prokaryotes, while mitosis occurs in eukaryotes (1)

- Binary fission produces two identical daughter cells, while mitosis produces two genetically different daughter cells (1)

MS9 (4 marks):

- Active transport requires energy (1)

- Active transport moves substances against a concentration gradient (1)

- Diffusion does not require energy (1)

- Diffusion moves substances down a concentration gradient (1)

MS10 (1 mark):

Differentiation