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Biology
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Part of the retina of a young rat was removed and kept in the dark for two hours. This allowed the pigment in the rod cells to recover from bleaching caused by exposure to light. Suggest what happens in the rod cells during this two hours of darkness.

Rhodopsin is the pigment found in rod cells, which consists of cis-retinal and the protein opsin. When the rod cells are kept in darkness, the opsin is uncoupled from the cell surface membrane of the rod ...

PL
Answered by Panos L. Biology tutor
5184 Views

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 ac...

PL
Answered by Panos L. Biology tutor
9744 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
2737 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...

UC
Answered by Urma C. Biology tutor
20831 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 att...

SB
Answered by Sophie B. Biology tutor
3600 Views

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