Download Chem 121 Homework 11: Nucleic Acids and more Exams Chemistry in PDF only on Docsity!
HOMEWORK
CHEM 121, section 1 Winter 201 5 Printed Name: Background for the Chapter. 22. Nucleic Acid Homework Feb 2 7 , 201 5 by 12:15 PM! Group Name:
Give the names of names of pentose sugars written in Fisher projections (linear form) below.
Give the names of names of pentose sugars written in Haworth projections (cyclic hemiacetal form) below. (Label the carbon atoms)
Give the names of names of bases and identify them as purines and pyrimidines (Label the atoms in the ring)
a) What is phosphate and phosphate mono/di-esters?
b) What is a nucleotide?
b) Draw the structure of dAMP and GMP
- Draw the following
a) Backbone of a nucleic acid
b) DNA sequence 5'-TGA CGG TAC CC-3'
- What is the difference between DNA and RNA?
DNA RNA
number of strands
sugar used
bases used
base pairs
possible locations
full name
- Write the type of RNA used for each of the following functions:
a) makes up part of the ribosome
b) delivers amino acid to the ribosomes
c) codes for proteins
- Fill in the table:
Name of process Location copying DNA making RNA from DNA making protein from RNA
b) Why is gene expression regulated?
- For each of the following mutations in the DNA sequence below, show then explain the effect that the mutation will have on the RNA and protein sequence and, if applicable, on the protein in general. (The numbers for each mutation below correspond to the arrows above the sequence.)
5'-TGA TTT CGG TAC GAT TAA CAA CCT CGA ATT CC-3'
a) T in GAT is replaced by C
b) T in TAA is replaced by C
c) first A in TAA is replaced by G
d) C in CAA is replaced by A
