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Biology
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Describe key structural differences between prokaryotic and eukaryotic cells.

Eukaryotic cells are larger and more complex than prokaryotic cells. The eukaryotic cell contains a nucleus, which contains genetic material in the form of linear chromosomes. However, prokaryotic cells c...

TD
20968 Views

Can lymphocytes have proteins that are complementary to host cell antigens?

You only kill off the ones that are reactive to host antigens (read: the ones that would attack your own cells!). So normal lymphocytic function isn't affected.

Because of the nature of the immune ...

SM
Answered by Scott M. Biology tutor
3279 Views

A student cut a piece of potato into 10 discs, each 1mm thick and with a 10mm diameter. He then placed them in a beaker of deionised water. After a couple of days, they had increased in size- both thickness and diameter. Explain why this is the case.

The cells composing the potato tissue contain fluid, or cytoplasm. This contains dissolved salts and these ions attract water molecules; cations, or positive ions, attract the partially negatively charged...

EK
Answered by Eva K. Biology tutor
3091 Views

Explain the process of mitosis

Mitosis is a form of cell division in which one cell (mother cell) divides into 2 genetically identical cells (daughter cells). Within the human body, mitosis replaces worn-out cells with new cells. Mitos...

HL
Answered by Hannah L. Biology tutor
42164 Views

What is homeostasis?

Homeostasis is the maintenance of a constant internal environment in organisms despite external changes. Homeostasis ensures that cells within an environment are able to meet their needs and function appr...

YB
Answered by Yinka B. Biology tutor
3612 Views

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