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Give one piece of evidence that supports the theory that mitochondria evolved from prokaryotic cells. (1 mark)

Size: mitochondria are 2uM in diameter, similar to bacteria. Also applies to genome size and content, suggesting an 'endosymbiosis' event.
LM
Answered by Lauren M. • Biology tutor
7660 Views

How does DNA lead to the production of proteins?

Proteins are encoded by the information stored in the DNA genetic material. This happens in two stages: transcription and translation. During transcription, the DNA unravels and exposes it's sequence, allowi...
MS
Answered by Millie S. • Biology tutor
3662 Views

Explain the process of translation for protein synthesis

Translation is the 2nd stage of protein synthesis, when the amino acids are assembled into a polypeptide. They are assembled into the sequence dictated by the sequence of codons on the mRNA (messenger RNA). ...
UB
Answered by Uzair B. • Biology tutor
7017 Views

Describe the differences in structure between an artery and a vein.

Blood is transported around the body by blood vessels. Arteries are responsible for carrying blood away from the heart, whilst veins are responsible for returning blood to the heart. Arteries and veins are b...
GW
Answered by Georgina W. • Biology tutor
18214 Views

How is DNA made into protein?

DNA is first transcribed into a messenger RNA molecule called mRNA, RNA is similar to DNA but contains Uracil instead of Thymine. RNA polymerase recruits nucleotides to build the mRNA molecule and binds them...
SM
Answered by Sophie M. • Biology tutor
5321 Views