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DNA Structure
Chagraff's Rules
DNA vocabulary
Skills in DNA
Miscellaneous
100
How many chromosomes are there in the human body?
23
100
Which base pairs match together?
A/T and G/C
100
What is the name for the twisted ladder structure of DNA?
Double helix
100
What does A pair with?
A pairs with T
100
Which scientists were credited with determining the double helix structure of DNA?
watson and crick
200
Sort these words in order from largest to smallest structure: Genes, Nucleus, cell, bases, chromosome
Cell, nucleus, chromosome, genes, bases
200
If you look at the percentage of nitrogenous bases in a DNA sample and you find that there is exactly 15% adenine, how much Thymine should you expect?
15% thymine since the amount of thymine is equal to the amount of adenine since they pair up
200
What part of DNA codes for the making of proteins which influences the way we look and the traits we have?
Genes
200
Complete the DNA sequence by writing the bottom strand: -A-T-G-G-C-T-T-A-C-
T-A-C-C-G-A-A-T-G
200
Which scientist had HER work stolen and was not given credit for solving the structure of DNA?
Rosalind Franklin
300
What 3 molecules make up nucleotides?
Phosphate, sugar and nitrogenous bases
300
If you have 15 % cytosine in a DNA sample, what percent Adenine + Thymine should you have?
70% of adenine and thymine combined. you have 15% C and 15% G. 100% -30% is 70% so you have 70% of both A and T
300
What are the complete names of the 4 nitrogenous bases found in DNA?
adenine, thymine, guanine, and cytosine
300
After you have solved for the bottom strand of DNA, how many bases represent the letter G? -G-T-C-G-A-T-T-G-C-C
-C-A-G-C-T-A-A-C-G-G, G shows up 6 times amongst both strands.
300
Why did we use strawberries instead of human cheek cells in our DNA lab?
strawberries are octaploids so they have more copies of each DNA. More DNA to see since DNA is so tiny
400
What force holds together the nitrogenous bases?
hydrogen bonds
400
If you know that there is 20 % guanine in a DNA sample, what percent Thymine will you have?
G = 30%
400
Where inside of the cell is DNA found?
the nucleus
400
In the twizzler lab, jane pairs two green marshmallows together (T) and (T). Why is this incorrect and how can she address this problem?
A and T go together Make one of them into an (A)
400
What was the role of soap in the strawberry DNA lab?
Soap dissolved the cell membrane to get the DNA out
500
In the DNA lab, what could you see and what could you not see ... (use academic vocabulary such as genes, nitrogenous bases, nucleotides, strands)
could see: strands, fibers Could not see: genes, chromosomes, bases.
500
Explain why this statement is false: it is possible to have 30% guanine and 40% Thymine in a dna sample
false because guanine and cytosine would be 60%, thymine and adenine would be 80% and that would be over 100% so it is not possible
500
Explain why this statement is false: DNA is found in the nucleus of prokaryotic cells
prokaryotic cells do not have a nucleus
500
You put 2 orange marshmallows together (G) and (G), how should you fix this mistake?
make one into a C
500
Why did we crush the strawberries in the dna lab?
to break the cells open since dna is inside of the cell.