Top answers

Biology
A Level

What is the role of neurotransmitters at synpatic junctions?

Firstly, it is important to understand what a synaptic junction is and its purpose. A synaptic junction is a type of gap junction between the pre-synaptic and post-synaptic membran...

KD
Answered by Karin D. Biology tutor
2958 Views

Outline the process of DNA replication.

For organisms to grow and repair cells are constantly replicating, and therefore the DNA within cells is also constantly replicating. The process begins with the enzyme DNA helicase break...

LH
Answered by Leo H. Biology tutor
15624 Views

Why can enzymes only catalyse one specific reaction?

Because enzymes have a specific tertiary structure which defines the 3D shape of the active site. This means that only a substrate with a complimentary shape to the active site can bind to it and form an ...

JM
Answered by Jasmine M. Biology tutor
7522 Views

Explain the difference in the rates of reaction at 60 °C and 37 °C between 20 and 40 minutes.

"A technician investigated the effect of temperature on the rate of an enzyme-controlled reaction. At each temperature, he started the reaction using the same concentration of substrate. Explain the ...

EC
Answered by Ellie C. Biology tutor
10720 Views

Describe what can be used to determine the time of death of a corpse

there are five different distinct methods whihc can be used to determine time of death:

  1. Body tempreture:

The body cools after death as there are no heat producing metabolic reac...

DP
Answered by Daniella P. Biology tutor
7411 Views

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