ASU BIO 353 Exam 2 short answer
Lecture 8-13 100% Correctly Solved
A ribosome contains two dissociable subunits: - ✔✔Large and small, mixture of rRNA
and proteins
Ribosomal proteins are
made in the - ✔✔cytoplasm
Ribosomal proteins are transported to the ___ to join with ____ to assemble two
ribosomal subunits - ✔✔nucleus, rRNA
What are the four binding sites in the ribosome for translation? - ✔✔mRNA-binding, A
site, P site, and E site
What types of proteins are involved in exporting mRNA out of the nucleus - ✔✔Poly-A-
binding protein, Cap-binding protein, Exon junction complex
What does dihydrouridine contribute to tRNA? - ✔✔it destabilizes the RNA
structure and makes it more flexible
Katelyn Whitman, All Rights Reserved © 2025 1
, three primary roles that ribosomes play during protein synthesis - ✔✔captures charged
tRNA, holds charged tRNA in position, covalently links amino acids to form
polypeptide chain
mRNA-binding site - ✔✔message always binds to small subunit first, then large subunit
binds
A Site (aminoacyl-tRNA site) - ✔✔binds each newly arriving charged tRNA and holds
it until peptide bond formed
P site (peptidyl-tRNA site) - ✔✔holds the tRNA carrying the growing polypeptide
chain
E site (exit site) - ✔✔site from which spent tRNAs is rejected
Lipid Rafts are localized regions of plasma membrane composed of elevated levels of -
✔✔cholesterol, protein, sphingolipids
he hydrocarbon chains of
sphingolipids are - ✔✔longer/ saturated
lipid rafts are - ✔✔thicker and more viscous. Makes them more tightly packed
Lipid rafts
compartmentalize
Katelyn Whitman, All Rights Reserved © 2025 2
Lecture 8-13 100% Correctly Solved
A ribosome contains two dissociable subunits: - ✔✔Large and small, mixture of rRNA
and proteins
Ribosomal proteins are
made in the - ✔✔cytoplasm
Ribosomal proteins are transported to the ___ to join with ____ to assemble two
ribosomal subunits - ✔✔nucleus, rRNA
What are the four binding sites in the ribosome for translation? - ✔✔mRNA-binding, A
site, P site, and E site
What types of proteins are involved in exporting mRNA out of the nucleus - ✔✔Poly-A-
binding protein, Cap-binding protein, Exon junction complex
What does dihydrouridine contribute to tRNA? - ✔✔it destabilizes the RNA
structure and makes it more flexible
Katelyn Whitman, All Rights Reserved © 2025 1
, three primary roles that ribosomes play during protein synthesis - ✔✔captures charged
tRNA, holds charged tRNA in position, covalently links amino acids to form
polypeptide chain
mRNA-binding site - ✔✔message always binds to small subunit first, then large subunit
binds
A Site (aminoacyl-tRNA site) - ✔✔binds each newly arriving charged tRNA and holds
it until peptide bond formed
P site (peptidyl-tRNA site) - ✔✔holds the tRNA carrying the growing polypeptide
chain
E site (exit site) - ✔✔site from which spent tRNAs is rejected
Lipid Rafts are localized regions of plasma membrane composed of elevated levels of -
✔✔cholesterol, protein, sphingolipids
he hydrocarbon chains of
sphingolipids are - ✔✔longer/ saturated
lipid rafts are - ✔✔thicker and more viscous. Makes them more tightly packed
Lipid rafts
compartmentalize
Katelyn Whitman, All Rights Reserved © 2025 2
