ACS Biochemistry Exam Questions And
Answers (Guaranteed A+)
What is a nucleotide? - answer✔Nucleotides are the monomer unit of nucleic acids. They're
composed of a nitrogenous base, 5-carbon sugar and a phosphate group
What is a biopolymer? - answer✔A polymer that is made by a living organism
Nucleic acids are biopolymers of what? - answer✔DNA and RNA
What are the key features of DNA? - answer✔DNA is more stable
carries genetic information
double-stranded
What are the key features of RNA? - answer✔RNA is less stable
Most forms are ntermediate in expression of genetic information
Can form secondary structures by hydrogen bonding with itself (ex: tRNA)
Usually single-stranded
What are the types of RNA, and what do they do? - answer✔tRNA: transfer RNA, holds amino
acids used in protein synthesis, wobble
rRNA: ribosomal RNA, part of the ribosome
siRNA: small interfering RNA,short term silencing of pleiotrophin coding genes, targets mRNA
for degradation
miRNA: micro RNA, silencing and post-transcriptional regulation of gene expression
RNA serves a wide variety of purposes compared to DNA; they can also catalyze reactions
Why does inosine display true wobble qualities? - answer✔Ff that is the first nucleotide in the
anticodon then any of three bases in the original codon can be matched with the tRNA
What are the two categories of nitrogenous bases? - answer✔Purines and Pyrimidines
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