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Red blood cells placed in pure water would:
B. Swell and burst
A. Crenate and die
C. Remain the same
D. Swell initially & then return to normal size once equilibrium is reached
Cell membrane is:
D. The phospholipid layer surrounding the cell
A. A double layer of protein enclosing the plasma.
B. Single layer cell
C. Membrane composed of carbohydrate.
D. The phosopholipid layer surrounding the cell
Which of the following is true of diffusion.
B. The diffussion is greater when the concentration gradient is greater
A. The rate of diffusion is dependant on temprature
B. The diffusion is greater when the concentration gradiant is greater
C. The molecular weightvof yhe molecule does not affect the diffusion.
D. Diffusion is greater when the body's temperatureis low
In a cell, calcium ions are stored in
D. In both smooth and rough endoplasmic reticulum
A. The nucleus
B. The Golgi apparatus
C. The mitochondria
D. in both smooth and rough endoplasmic reticulum
Which of the following is not a subcellular structure
A.intercellular material
A. Intercellular material
B. Cytoplasm
C. Membranes
D. Organelles
Which of the following transport system requires energy?
C. Sodium and potassium pump
A. simply diffusion
B. Osmosis
D.facilitated diffusion
Phospholipids :
B. Are hydrophilic and hydrophobic
A.Contain pinny polar trails
C. Contain only non-polar tails
D. Have their tails directed to the outside
Mitochondria :
A. contain some of the genes to replicate themselves
A.contain some of the genes to replicate themselves
B. Synthesise proteins for use outside the cell
C. Have the same shape all the time
D.are single membrane structure involved in the newish of carbohydrates
Fluid moves through a process called
A. Osmosis
B. diffusion
C. mitosis
D. Exocytosis
Cells in a hypertonic solution will.
C. Will remain the same
D. Both A and B
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