Top answers

Explain how the sinoatrial node (SAN) ensures that oxygenated blood enters the aorta.

The sinoatrial node is a region found on the right atrium which acts as a pacemaker. Cells at the SAN can depolarise (become more positively charged with respect to the outside) and generate electrical activ...
PL
Answered by Panos L. • Biology tutor
10339 Views

Respiration and photosynthesis-what are the similarities and differences?

Respiration in both animals and plants Photosynthesis only in plants Will explain further in interview
AA
Answered by Abuzar A. • Biology tutor
3165 Views

State three differences between daughter cells produced by the process of mitosis and those produced by meiosis.

Meiosis is a type of cell division that only occurs in the sex organs, testes and ovaries, mitosis occurs in every cell in the body, these are somatic cells. Daughter cells are the cells that are produced as...
UC
Answered by Urma C. • Biology tutor
21928 Views

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
4063 Views

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
14301 Views