Key Concepts in Biology

Question 1

Plant Cells v Animal Cells

Answer 1

Plant Cells have a Chloroplast and Animals do not

Animal Cells do not have a permanent Vacuole and Cell Wall

Plant: Cell wall on the outside, cell membrane on the inside

Question 2

Function of Permanent Vacuole in Plants

Answer 2

Filled with cell sap to help keep the cell turgid.

Question 3

Function of Mitochondria

Answer 3

Where aerobic respiration occurs, producing the energy needed for the cell to survive and function and contains enzymes for cellular respiration.

Question 4

Parts of a Bacterial Cell

Answer 4

• Plasmid
• Circular (loop) of DNA
• Cell Wall and Cell Membrane
• Ribosomes
• Cytoplasm

Question 5

Role of Acrosome

Answer 5

Contains enzymes which helps break down coating of egg, allowing sperm to penetrate egg

Question 6

Difference between Diploid and Haploid

Answer 6

Haploid: Single Set of 23 Chromosomes within a Gamete

Diploid: Two Sets of 23 chromosomes (46) when two gametes combine

Question 7

Role of Ciliated Epithelial Cells

Answer 7

Move substances in one direction

For example, Ciliated Epithelial Cells help move mucus (that traps unwanted inhaled substances) up towards the throat.

Question 8

Quantitative Units

Answer 8

a milli (10^−3)
b micro (10^−6)
c nano (10^−9)
d pico (10^−12)