Question

question 5
a cell biologist compared the properties of rough endoplasmic reticulum (er) and smooth er. she found that one type of er is used for protein storage, and the other is used for lipid storage. what accounts for this difference?

o a smooth er creates amino acids for ribosomes to form into proteins.
o b rough er forms proteins and transports them to the mitochondria.
o c rough er has ribosomes on its surface.
o d smooth er works with the nucleus to synthesize protein.

question 6
a frame shift mutation has the potential to change the
o a order of hydrogen bonds in dna before the shift
o b sequence of nitrogen bases in a strand of messenger rna, and the protein made
o c chemistry of phosphate groups in a strand of messenger rna.
o d types of sugars in dna and shift these sugars to the right.

Explanation:

• For Question 5: Rough ER has ribosomes on its surface which are involved in protein synthesis. Smooth ER is involved in lipid - related functions like lipid storage. Option a is incorrect as smooth ER does not create amino acids. Option b is incorrect as rough ER does not transport proteins to mitochondria. Option d is incorrect as smooth ER is not involved in protein synthesis.
• For Question 6: A frameshift mutation (insertion or deletion of a nucleotide) changes the reading frame. This affects the sequence of nitrogen bases in mRNA (since mRNA is transcribed from DNA) and thus the protein made (as the codons on mRNA determine the amino - acid sequence of the protein). Option a is incorrect as it is about hydrogen bonds in DNA. Option c is incorrect as it is about phosphate groups. Option d is incorrect as it is about sugars in DNA.

Answer:

Question 5: C. Rough ER has ribosomes on its surface.
Question 6: B. sequence of nitrogen bases in a strand of messenger RNA, and the protein made.