List 3 differences between plant and animal cells.
Answer:
1. Plants have cell wall,
2. chloroplasts,
3. and central vacuole
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Membrane proteins are not very soluble in water, because they possess long stretches of non-polar amino acids that are
A. too long to interact with the water molecules. B. hydrophobic. C. are transmembranal. D. hydrophilic. E. used as transport channels.
How do scientists use the term theory?
A) as a hypothesis that has not yet been tested B) as a hypothesis that seems logical but cannot be tested because it's impractical to do so C) as a set of findings that are supported by repeated testing D) as ideas which are so obviously true that testing is not required
What is necessary in order for organisms to change over generations?
What will be an ideal response?
Glycophorin is a heavily glycosylated protein found on the red cell membrane. One or more of the statements in the following list may apply to this protein:
(i) It is a Type I membrane protein (ii) It is a Type II membrane protein (iii) It is a Type III membrane protein (iv) The carbohydrate composition of the protein gives the red cell a hydrophilic surface which allows them to circulate without 'sticking' to other cells or vessel walls. (v) The carbohydrate composition of the protein gives the red cell a hydrophobic surface which allows them to circulate without 'sticking' to other cells or vessel walls. (vi) The carbohydrate composition of the protein gives the red cell a surface which allows them to specifically 'stick' to the vessel walls so they can deliver oxygen to respiring tissues.