Top answers

Biology
A Level

Describe prions and their function, give example of prion disease

Prions are certain proteins naturally occuring in organisms that have assumed wrong conformation during folding. This misfolded structure is highly infectious - if it comes into contact with healthy versi...

KN
Answered by Klára N. Biology tutor
4221 Views

Explain the role of auxins in the control of phototropism

A phototropism is the growth of a plant in response to light. This is mediated by auxins such as IAA (Indoleacetic acid). This is released in the tips and shoots of flowering plants. In response to light ...

FT
Answered by Florence T. Biology tutor
5156 Views

Explain the route and role of calcium ions in the Sliding Filament theory of muscle contraction

ROUTE: when an action potential arrives at the neuromuscular junction, Calcium ions are released from the sarcoplasmic reticulum, into the sarcoplasm, wh...

EC
Answered by Erin C. Biology tutor
15217 Views

Explain How Macrophage becomes an Antigen presenting cell

Phagocytosis occurs:The Macrophage surrounds and envelops the pathogen with pseudopodia The pseudopodia envelops the bacteria completely forming a vesicle, called a phagosomephagosome is fused with a lyso...

IC
Answered by Ibtihaj C. Biology tutor
2583 Views

What is protein Structure

Protiens are polymer of amino acidsAmino acids are joined by peptide bondsPeptide bonds are formed by condensation4 different structures Primary structure is sequence of amino acids held together by pepti...

VW
Answered by Victoria W. Biology tutor
2358 Views

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