Cell Biology Answers

Changing the shape of a protein is also known as a change in its ___________.

Answer choices

a) conformation

b) primary structure

c) nature

Changing the shape of a protein is also known as a change in its ___________.

Answer all of the following questions concerning protein synthesis by the endoplasmic reticulum: (Total of 7 Marks) a. Name the structure that binds to the SRP at the honest of secretory protein synthesis. (1 Mark) b What happens to protein synthesis when the above binding (a) is established on the nascent polypeptide chain? (1 Mark) c What facilitates the association of the ribosome with the translocon of the ER membrane? (2 Mark) d. Which molecule recognizes and binds to unfolded or misfolded proteins and help them attain their native structure. (1 Mark) e. Which molecule is responsible for degrading misfolded proteins? (1 Mark) t. Where are misfolded secretory proteins eventually destroyed? (1 Mark)

generally, is glycolysis endergonic or exergonic?

Explain what is meant by the term ‘linked genes’ with respect to homologous recombination.

Question 5: Which organ and cell type are primarily affected by the mutation? Is this consistent with the symptoms observed in SCA1 patients?

Mice are generally a good model for human diseases, if you wish, you can read more about the benefits of the mouse model on The Jackson Laboratory website  <span style="color:#E90167">Advantages of the mouse as a model organism</span>.

Mouse models of SCA1 have been developed and helped researchers to understand this disease and to experiment with new treatments.

The Ras protein functions as a molecular switch that is set to its “on” state by other proteins that cause it to release its bound GDP and bind GTP. A GTPase-activating protein helps reset the switch to the “off” state by inducing Ras to hydrolyze its bound GTP to GDP much more rapidly than it would without this encouragement. Thus, Ras Works like a light switch that one person turns on and another turns off. You are studying a mutant cell that lacks the GTPase-activating protein. What abnormalities would you expect to find in the way in which Ras activity responds to extracellular signals?

Learning Journal

• Briefly summarize the processes of mitosis and meiosis indicating where the similarities lie and in which aspects they differ. Don't forget to mention the primary reason for each type of cell division by indicating the roles that mitosis and meiosis play in human reproduction and development.
•  Explain what is meant by the term ‘linked genes’ with respect to homologous recombination. For example, if an organism is heterozygous at two genetic loci on the same chromosome, in what way does the position of these alleles with respect to each other affect how they are transmitted to gametes during meiosis?

what effect did the increase in atmospheric oxygen by photosynthetic organisms have on earth in terms of the geosphere 

how does our current atmosphere support the concept of a simultaneous coevolution of earth’s systems and life on earth ?