Top answers

Biology
A Level

What is crossing over?

Crossing over is a process that happens during meiosis and results in genetic variation in gametes. It happens between prophase and metaphase. Pairs of homologous chromosomes lined up next to each other t...

EB
Answered by Erin B. Biology tutor
33263 Views

Explain the process of semi-conservative DNA replication.

  • The enzyme DNA helicase breaks the hydrogen bonds between the two polynucloetide DNA strands causing the double helix to unzip, forming two single strands.

  • Each original single...

BJ
Answered by Bardwell J. Biology tutor
58224 Views

What is a condensation reaction?

A condensation reaction is the formation of a chemical bond between two molecules with the elimination of a water molecule. You can tell this reaction has occurred when you see an equation written down as...

RN
Answered by Rebecca N. Biology tutor
5823 Views

What are the four stages of aerobic respiration in humans?

Glycolysis which is where glucose is broken down into 2 molecules of pyruvate releasing 2ATP and 2NADH. Second is the link reaction. This links glycolysis to the Krebs Cycle. Pyruvate molecules are decarb...

TK
Answered by Taqua K. Biology tutor
7714 Views

What is the difference between non competitive and competitive inhibitors?

Competative inhibitors bind with the enzyme at the active site, blocking the substrate from binding and therefor preventing the substrate from binding and forming enzyme substrate complexes. Therefor if y...

AK
Answered by Anja K. Biology tutor
7171 Views

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