Let's start out with an easy one. Fill in the blanks below.
1. Adenine bonds with thymine (in DNA), and guanine bonds with _______.
2, In RNA, Adenine bonds with _________.
3. What is the difference between a purine and a pyrimidine?
Re: Heredity B/Designer Genes C Question Marathon
Posted: September 14th, 2013, 12:43 pm
by strawberrygirl
ScienceOlympian wrote:Let's start out with an easy one. Fill in the blanks below.
1. Adenine bonds with thymine (in DNA), and guanine bonds with _______.
2, In RNA, Adenine bonds with _________.
3. What is the difference between a purine and a pyrimidine?
1. Cytosine
2. Uracil
3. Purines have two rings, while pyrimidines have one ring, so purines are twice as wide as pyrimidines
Re: Heredity B/Designer Genes C Question Marathon
Posted: October 26th, 2013, 10:31 pm
by ScienceOlympian
Lol, this is REALLY late, but correct! Your turn!
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 13th, 2013, 4:50 pm
by Sciolapedia
Its not my turn but since its been a couple weeks im just gonna ask the next question.
In what direction does Dna polymerase add the nucleotides in dna replication ?( 5 to 3 or 3 to 5)
Why does this cause a problem in the lagging strand? Because of this, what results in the lagging strand?
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 13th, 2013, 8:08 pm
by jjetpack
I always want to answer based on the parental strand instead of the newly synthesized one and say that it goes 3'->5', instead of 5'->3'(I think this is the answer you're looking for).
The lagging daughter strand is running 3'->5', and the DNA polymerase can only go 5'->3', so the polymerase is forced to code short segments at a time, called Okazaki fragments
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 14th, 2013, 3:11 pm
by Sciolapedia
Yup your turn
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 14th, 2013, 10:42 pm
by jjetpack
Define an operon
Name the structural genes of the lac operon
What does the lacI (<-- uppercase i) gene do?
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 29th, 2013, 9:04 am
by brettt
jjetpack wrote:Define an operon
Name the structural genes of the lac operon
What does the lacI (<-- uppercase i) gene do?
An operon is a group of genes or a segment of DNA that functions in a coordinated matter consisting of an operator, promotor, and structural genes.
The structural genes of the lac operon are Lac Z (beta-galactosidase enzyme), Lac Y (permease enzyme), and Lac A (acetylase enzyme).
The lacI is the regulatory gene. It produces mRNA which in turn produces a repressor protein, which can then bind the the operator of the lac.
Re: Heredity B/Designer Genes C Question Marathon
Posted: November 30th, 2013, 10:33 am
by Bramblestar
I have a question!What unwinds the DNA strand? What is a Replication Fork? And, what is an Okazaki Fragment?
