Limited time offer 20% OFF StudySoup Subscription details

USM - MLS 103 - Class Notes - Week 4

Created by: Kierra Thompson Elite Notetaker

> > > > USM - MLS 103 - Class Notes - Week 4

USM - MLS 103 - Class Notes - Week 4

School: University of Southern Mississippi
Department: Science
Course: Biology & Society
Professor: Emily Clark
Term: Fall 2016
Tags:
Name: Biology 103, week 4 notes
Description: Will cover exam 2
Uploaded: 09/19/2016
This preview shows pages 1 - 2 of a 4 page document. to view the rest of the content
background image Week 4 Biology notes DNA: structure, replication, and protein synthesis DNA o Hereditary molecule that is common in all life forms
o Passed from parent to offspring
o Instruction manual which dictates how we’re assembled
o Found in the nucleus
o Molecules are super long, need to be organized
Organized by chromosomes Chromosome o Single long dna molecules wrapped around proteins
o Humans have 23 pair
For each pair, one from mom, one from dad o Last pair is the sex chromosome
o XX  female
o XY  male 
Dna is composed of nucleotides o Nucleotides have 3 parts Sugar Phosphate Base o Nucleotides have 1 of 4 bases 1) Adenine (A) 2) Thymine (T) 3) Guanine (G) 4) Cytosine (C) Double Helix o Two strands of nucleotides pair up and twist around each  other to form a spiral shape The phosphate of one nucleotide binds to the sugar 
of another 
forms the backbone Bases are hydrogen bound to each other and form 
the rungs of the ladder.
This holds the two strands together! A binds to T G binds to C Dna is used as the foundation for a number of activities o The most basic is replication Natural process which cells make an identical copy of
a DNA molecule
Body needs to undergo mitosis (division of cells) Takes place in the nucleus
background image Complimentary base-pairing rules o Unwind DNA strand  dna helicase
o Dna polymerase, an enzyme reads the old sequence and 
add complementary nucleotides o Now 2 copies of the original molecule exist
o Each molecule consists of one of the strands of the original
DNA molecule and a new strand. Dna replication is semi conservative o Each molecule consists of one of the strands of the original DNA DNA is an instruction manual that tells your body how to make 
proteins
o Instructions are found in your genes Gene is a sequence of DNA that contains the 
instruction to make at least one protein
Humans have about 20,000 genes Where do you find Genes? Found on chromosomes Each chromosome carries a unique set of genes Synthesis of a protein from a gene is called gene expression What is Gene expression process of converting genetic information into protein two main steps: o transcription and translation
o Transcription occurs in the nucleus of the eukaryotic cells 
and cytoplasm of prokaryotic cells o Transaction occurs in ribosomes in cytoplasm Transcription o molecules of messenger RNA (mRNA) are synthesized from the instructions encoded in genes o RNa polymerase binds to the regulatory sequence of the  gene to be transcribed. DNA strands unwind, exposing the 
coding sequence of the gene
Gene has 2 very important components o Coding sequence – part of the gene that determines the  amino acid sequence of a protein o Regulatory sequence - part of the gene that determines  when, where, and how much protein a gene makes. Transcription cont.….

This is the end of the preview. Please to view the rest of the content
Join more than 18,000+ college students at University of Southern Mississippi who use StudySoup to get ahead
4 Pages 9 Views 7 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
Join more than 18,000+ college students at University of Southern Mississippi who use StudySoup to get ahead
School: University of Southern Mississippi
Department: Science
Course: Biology & Society
Professor: Emily Clark
Term: Fall 2016
Tags:
Name: Biology 103, week 4 notes
Description: Will cover exam 2
Uploaded: 09/19/2016
4 Pages 9 Views 7 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
Join StudySoup for FREE
Get Full Access to USM - MLS 103 - Class Notes - Week 4
Join with Email
Already have an account? Login here
×
Log in to StudySoup
Get Full Access to USM - MLS 103 - Class Notes - Week 4

Forgot password? Reset password here

Reset your password

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
Sign up
We're here to help

Having trouble accessing your account? Let us help you, contact support at +1(510) 944-1054 or support@studysoup.com

Got it, thanks!
Password Reset Request Sent An email has been sent to the email address associated to your account. Follow the link in the email to reset your password. If you're having trouble finding our email please check your spam folder
Got it, thanks!
Already have an Account? Is already in use
Log in
Incorrect Password The password used to log in with this account is incorrect
Try Again

Forgot password? Reset it here