BIO206H5 Study Guide - Final Guide: Thymidine Triphosphate, Gc-Content, Uracil

560 views5 pages
18 Feb 2016
School
Department
Course
Michelle Chyjek (1001326371)
BIO206 – TUT0113
Nucleic Acids Worksheet Answers
1. The repeating structural components that make up DNA and RNA are
nucleotides.
a) Nucleotides are composed of a 5-carbon sugar (either deoxyribose
in DNA or ribose in RNA), a nitrogenous base (adenine, guanine,
cytosine, thymine, or uracil), and one or more phosphate groups (PO42-)
b)
2.
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in
Michelle Chyjek (1001326371)
BIO206 – TUT0113
3. There is no TTP (thymidine triphosphate with ribose sugar) in cells
because thymine is not one of the nitrogenous bases incorporated in RNA
molecules, so the molecule is not present in cells.
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 5 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Bio206 tut0113: there is no ttp (thymidine triphosphate with ribose sugar) in cells because thymine is not one of the nitrogenous bases incorporated in rna molecules, so the molecule is not present in cells. Bio206 tut0113: uracil is methylated to form thymine before it can be incorporated into. Dna because otherwise, uracil would base pair with cytosine, causing deamination and the cytosine would also become uracil. If uracil were to be a naturally occurring base in dna, repair enzyme during dna replication would not be able to recognize whether uracil is the appropriate base or whether it arose spontaneously from a cytosine base. Sine dttp is used in dna rather than dutp, whenever a uracil base is detected in the double helix, repair enzymes can automatically replace it with cytosine. Rna uses uracil as one of its bases rather than thymine.

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
Booster Classes