Top answers

Why could a single base mutation stop an enzyme from catalysing a reaction?

Because the single base mutation would change the primary structure of the enzyme which in turn would change the secondary structure of the enzyme due to the differences in hydrogen bonds formed. As a result...
Answered by • Biology tutor
3054 Views

Describe how mutations in tumour suppressor genes can lead to the development of tumours

Tumour suppressor genes (TSGs) are genes whose protein products restrain inappropriate cell growth and division. A mutation results in a changed amino acid sequence, which alters the tertiary structure of th...
YP
Answered by Yva P. • Biology tutor
4738 Views

What are the stages of the cell cycle?

Interphase and Mitosis make up the cell cycle.Interphase includes 3 phases- G1- Cell growth phase and this is where cell multiply their organelles and their cytoplasms expand;S phase- DNA synthesis phase and...
JB
Answered by Jade B. • Biology tutor
4837 Views

Explain how oestrogen can lead to the development of breat cancer

Oestrogen is a lipid soluble molecule, so it diffuses into the cell across the plasma membrane. It then binds to a recptor inside the cell and this causes it to relocate to the nucleus. The receptor then act...
JM
Answered by James M. • Biology tutor
3509 Views

What is the structure of cellulose (polysaccharide)?

the simplest molecule present is beta glucose. These are bonded to each other via glycosidic bonds through a condensation reaction. Each molecule has been rotated 180 degrees compared to the previous one. th...
DC
Answered by Dhiren C. • Biology tutor
14157 Views