Biology was gcse paper 1

Question 1

Differences between prokaryotic (bacteria cells) and eukaryotic cells (animal and plant cells)

Answer 1

Bacteria lack a nucleus and chloroplasts they are smaller and have circular DNA and plasmids

Question 2

What is a plasmid

Answer 2

The genetic material in bacteria cells that can replicate independently of the chromosomes they are typically a small circular DNA strand in the cytoplasm

Question 3

How are sperm cells adapted for their function

Answer 3

Acrosome- contains enzymes to digest a path through the egg
Tail/flagellum help it swim to the egg
Haploid nucleus so diploid is formed at fertilisation
Many mitochondria to release energy for sperm to swim