315 Homework #4x

315 Homework #4x - Homework Assignment #4 (due date Mar...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Homework Assignment #4 (due date Mar 13 th , 5pm) Last 6 digit SID: __________ 1) About 30% of point mutation (substitutions) that occur in coding regions of DNA are harmless. Why? (1 pt) a) Because only 30% of the DNA is actually coding for amino acids a) Because only 30% of the DNA is actually coding for amino acids b) Because only 70% of the DNA is actually coding for amino acids c) Because most amino acids are specified by several codons that differ at the third position d) All of the above 2) Which type of mutation is likely to be the most harmful? (1 pt) a) A base substitution in which a valine is replaced by a leucine b) AA +33 fframeshift hift mutti tation b) c) A base substitution in which a glutamic acid is replaced with an aspartic acid d) A +1 frameshift mutation 3) Niremberg used the enzyme polynucleotide phosphorylase to assembe RNAs with random sequences in the absence of a template. Suppose they added the enzyme to a solution of 90% CTP and 10% UTP, and then used a cell
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/25/2009 for the course BIO 315 taught by Professor Steiner during the Spring '08 term at Kentucky.

Page1 / 3

315 Homework #4x - Homework Assignment #4 (due date Mar...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online