BIOLOGY 1A03 Lecture Notes - Lecture 2: Unit, Methionine, Tryptophan

13 views3 pages

cyanporpoise363

9 Feb 2017

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

doinhumolalala and 39849 others unlocked

BIOLOGY 1A03 Full Course Notes

Verified Note

9 documents

Document Summary

Determine the minimum number of nucleotides that may constitute a codon. Examine experiments that reveal the details of the genetic code. Consider the next step, translating the genetic code into a protein sequence. Does 1 base code for an amino acid: since there are only 4 bases in mrna, a 1-base code would only code for 4 amino acids. Do 2 base code for an amino acid: a 2-base code would code for a maximum of 16 amino acids. Do 3 bases code for an amino acid: a 3-base code would code for a maximum of 64 amino acids. A simple repeated sequence of nucleotides is translated into a simple repeated sequence of identical amino acids. This repeated tract of uracils and cytosines produces a string of alternating amino acid residues. Unit 6 rna and the origins of life. A codon is a triplet of nucleotides in a gene or in the mrna copy of a gene.

Related Questions

The genetic code in our world is a triplet code using combinations of four letters (A,U,G,C). All code words (codons) are the same size, three bases long. Proteins in our world are build using combinations of 20 different subunits (amino acids). In class, we argied tjat imder the conditions in our world (only four differebt letters in mRNA to code for 20 different amino acids in proteins) a triplet code is the smallest possible code that could be sued. A) list the other properties of our genetic code. C) what do we mean by the term degenerate code? Cam a doutblet code also be a degenerate code? (If yes, under what circumstances? If no, why not?) D) Does degeneracy in its genetic code represent 1) an advantage; 2) a disadvantage or 3) both and advantage and a disadvantage or 4) neither an advantage nor a disadvantage to an organism?

Which of the following is NOT a direct consequence of the fact that DNA polymerase can only build onto the end of an existing nucleic acid?

Question 6 options:

	DNA replication requires primers
	Bits of DNA are lost from the ends of your chromosomes in each successive round of replication
	RNA is involved in DNA replication
	The enzyme "primase" is needed for DNA replication
	There are multiple origins of replication on each eukaryotic chromosome

How does a nucleotide sequence code for a protein in nearly all living organisms?

Question 7 options:

	a sequence of 3 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 64 different amino acids
	a sequence of 2 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for one of 20 different amino acids
	a sequence of 3 nucleotides can code for 3 different amino acids

Fill in the blanks. To make one strand of DNA, _________ monomers are linked together in a chain, forming a polymer we call a(n) ________ .

Question 8 options:

	nitrogenous bases, hydrogen bond
	nucleotide, nucleic acid
	amino acid, nucleic acid
	nucleotide, nitrogenous base
	amino acid, protein

Which of the following was NOT part of the ideas that Darwin used in his book On the Origin of Species?

Question 9 options:

	organisms vary in characteristics that affect survival and reproduction
	variation in traits is often heritable
	descent with modification explains life's unity and life's diversity
	organisms inherit characteristics from their parents that the parents acquired in their own lifetimes
	natural selection is a cause of adaptive evolution

Here is a hypothetical mRNA sequence:

5' G G A U G C U A G U A U G A 3'

What is the amino acid sequence encoded by this mRNA?

Question 10 options:

	Met-Ile-Val
	Asp-Ala-Ser-Met
	Met-Leu-Val
	Ser-Met-Ile-Val
	Gly-Cys

1. What was the purpose of using blender to liquefy the onion before adding the DNA lysis. 2. What was the purpose of heating the onion solution before filtering it it and adding the ethanol? 3. what was the purpose of adding ethanol to the filtered DNA solution. 4. what is the template DNA for the following RNA strand. AUGCCGAUCCGUUAAG 5. If the RNA in the previous strand were translated, what would the order of the amino acid chain be? 6. List one possible mRNA strand that would code for the following amino acid chain: Mathionine, proline, glycine, glutamic acid, alanine. Don't forget to add the stop codon. 7.List the template DNA that would correspond to the mRNA strand in the previous question. 8. What amino chain would the following template DNA strand code for:--T A C G G C C C C G G A T T A A T T-? show your work?

pearseal3

BIOLOGY 1A03 Lecture Notes - Lecture 2: Unit, Methionine, Tryptophan

BIOLOGY 1A03 Full Course Notes

Document Summary

Get access

Related Documents

BIOLOGY 1A03 Study Guide - Final Guide: Rna Tie Club, Rna World, Start Codon

BIOLOGY 1A03 Chapter 2: The Genetic Code

BIOLOGY 1A03 Chapter Notes - Chapter 2-2: Marshall Warren Nirenberg, Start Codon, Phenylalanine

Related Questions