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How does the process of transcription work?

The 2 DNA strands are split apart by DNA Helicase by breaking the hydrogen bonds between complementary base pairs, with the sense strand being used as a template. Free RNA nucleotides in the cytoplasm attach...
SB
Answered by Sophie B. • Biology tutor
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What is the effect of an increase in substrate concentration on the rate of reaction?

An increase in the substrate concentration increases the rate of reaction initially as more enzyme-substrate collisions occur , resultng in more enzyme-substrate complexes being formed. Eventually maximum ve...
PK
Answered by Parissa K. • Biology tutor
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Describe the processes that occur at a cholinergic synapse to allow signal transmission

When an action potential arrives at the end of a presynaptic neurone, it causes the uptake of calcium ions through ion channels in the wall of the synapse. This influx of calcium ions causes vessicles of ace...
TD
Answered by Tara D. • Biology tutor
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Describe the events that take place at the synapse that enable transmission of a nerve impulse.

An action potential arrives at the synapse, triggering Ca2+ channels to open. This in turn triggers vesicles holding neurotransmitter to fuse with the presynaptic membrane, releasing the neurotransmitter int...
SA
Answered by Shrinivas A. • Biology tutor
20230 Views

What is the sliding filament theory of muscle contraction?

There are two main muscle filaments in muscle fibres: Actin and myosin filaments . Actin filaments are thin and have binding sites for the globular heads of myosin filaments. Myosin filaments are thick and f...
KF
Answered by Kasia F. • Biology tutor
28348 Views