Top answers

Biology
A Level

What's the difference between a eukaryotic cell and a prokaryotic cell?

Eukaryotes have a plasma membrane, nucleus, nuclear membrane, nucleolus, smooth endoplasmic reticulum, rough endoplasmic reticulum, ribosomes, mitochondria, lysosomes, peroxisomes.

Prokaryotes do n...

ED
Answered by Elena D. Biology tutor
3355 Views

How does the heart pump blood around the body?

The easiest way to think of the human heart is as 2 separate pumps in one loop. The first pump is the right side of the heart, which receives deoxygenated blood from the systemic circulation (the body). T...

AS
Answered by Alice S. Biology tutor
8475 Views

Why does Maltase only catalyse Maltose?

Enzymes are proteins with specific tertiary structures. Part of this structure forms an active site. Only the substrate of an enzyme, in this case Maltose, fits/ binds to the active site. This forms an en...

GS
Answered by Georgia S. Biology tutor
17041 Views

What is semi-conservative replication?

During DNA replication, the two DNA strands separate and each acts as a template (due to base pairing) for DNA polymerase to use to make the second strand of DNA. As a result, each new DNA molecule has on...

XW
Answered by Xanthe W. Biology tutor
9806 Views

Explain the structure of a DNA polynucleotide strand

Think of DNA like 2 long shoelaces coiled around each other to form a spiral - or a double helix as it's called. Each of the 2 shoelaces is called a 'strand' and is made up of something called 'polynucleo...

DF
Answered by Darius F. Biology tutor
7072 Views

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