Biochemistry ACS Exam (All Accurate 100%)

nucleotides correct answers monomeric unit for nucleic acids and are composed of nitrogenous base, 5-carbon sugar and a phosphate nucleic acids are biopolymers of correct answers nucleotide monomers DNA correct answers -more stable - carrier of genetic information - double stranded RNA correct answers - less stable - intermediate in expression of genetic information - can form secondary structure (as in tRNA) by hydrogen bonding with itself - not all forms of RNA are intermediates in expression of genetic information - single stranded (usually) types of RNA correct answers - tRNA - rRNA - siRNA - miRNA tRNA correct answers - transfer RNA - holds amino acids used in protein synthesis - WOBBLE position (inosine) rRNA correct answers - ribosomal RNA - part of the ribosome siRNA correct answers - small interfering RNA - short term silencing of pleiotrophin coding genes - targets mRNA for degradation miRNA correct answers - micro RNA - silencing and post-transcriptional regulation of gene expression purines correct answers - 2 rings - adenine, guanine pyrimidines correct answers - single ring - cytosine, thymine