Class Notes (838,578)
Canada (510,963)
BIOL1010 (3)
Cheryl (3)
Lecture

DNA Review and Mutation

4 Pages
96 Views
Unlock Document

Department
Health Sciences
Course
BIOL1010
Professor
Cheryl
Semester
Winter

Description
DNA, Mitosis, and Cancer DNA review • DNA: double helix, sides made of sugar and phosphate, middle make of nitrogenous bases • Adenine, Thymine, Guanine, Cytosine, millions of combinations in DNA • Copying DNA in cell division: 1. DNA helicase unzips DNA, 2. DNA polymerase enters the gap and builds the new side of the DNA using free floating nucleotides DNA polymerase • = enzyme catalyst (quickens reaction)  assists covalent bonding of the nucleotides along the sugar phosphate backbone Mutations • Sometimes errors occur during DNA replication • DNA mutations may lead to a protein being the wrong shape and .: not working properly Chromosome • DNA condenses into chromosomes formation • 1 wraps around proteins called histones, when tightly coiled is called chromosomes • DNA in the chromosome was replicated and 2 sister chromatids are formed and held together by centromere Cell Division • Many cells divide to reproduce or to replace themselves (skin)  growth, healing, development (from egg), asexual reproduction (bacteria, plants) Cell Cycle Interphase: normal functioning phase of the cell, length varies • G1 phase: organelles duplicate, cell replication is close
More Less

Related notes for BIOL1010

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit