Exam-style questions

Question 1

Do viruses & bacteria have cytoplasm

Answer 1

only bacteria has cytoplasm

Question 2

Do viruses & bacteria have nucleic acids

Answer 2

both viruses and bacteria have nucleic acids

Question 3

Do viruses & bacteria have capsids

Answer 3

only bacteria has capsids

Question 4

Using the fluid mosaic model of the cell membrane, explain how a macrophage carries out phagocytosis of bacteria

Answer 4

The cell membrane of the macrophage interact with the bacteria.Pseudopods form around the bacteria, causing by the movements of the phospholipids. The macrophage keeps the bacteria inside a vesicle

Question 5

Distinguish between bacteriostatic antibiotics, and bactericidal antibiotics

Answer 5

bacteriostatic antibiotics stops the bacteria from dividing, whilst bactericidal antibiotics kills the bacteria

Question 6

why is the permeability of chloride ions higher in the cell surface membrane of an epithelial cell, than a phospholipid bilayer

Answer 6

chloride ions are charged, meaning they cannot diffuse directly through the membranes. Thus, they need integral proteins, such as carrier and channel proteins, to carry them across via facilitated diffusion