separates into 2 strands
new strands form
new bases added following base pairing rules
100
A nucleic acid (like DNA) that consists of a long chain of nucleotides
What is RNA?
100
A triplet of bases forming an amino acid.
What is a Codon
200
The date Franklin conducted her experiments with X-rays
What is the early 1950's?
200
The three components of DNA
What are the phosphate group, sugar, bases
200
What is the role of DNA polymerase?
It is to make DNA from nucleotides. Some forms work to copy one molecule of double-stranded DNA into two new double stranded DNA molecules.
200
3 Differences between RNA and DNA
What is 1) RNA is single strand, DNA is double 2) Thymine is replaced with Uracil in RNA 3) DNA is made of Deoxyribose, RNA is made of Ribose
200
How is a codon read?
It is read three “letters” at a time, so that each “word” is three bases long and corresponds to a single amino acid
300
What clues as to the properties of DNA can be gleaned from her X-ray photograph?
What evidence did her X-ray photographs point to?
a. DNA has a helix shape
b. There are two strands in the structure
c. nitrogenous bases are near the center of the DNA molecule
d. all of the above
D. All of the above
300
The four bases of DNA?
What are Adenine, Guanine, Cytosine, and Thymine
300
In prokaryotes, the DNA is found in...
What is the cytoplasm
300
Guanine is paired with….
What is cytosine?
300
A collection of codons of mRNA, each of which directs the incorporation of a particular amino acid into a protein during protein synthesis
What is the genetic code?
400
The names of the scientists who built a 3D model of DNA
Who are James Watson (an american biologist), and Francis Crick (a British physicist)
400
According to Chargaff's rule Adenine pairs with...
What is Thymine
400
In eukaryotes, the DNA is found in...
What is the nucleus
400
Adenine is paired with….
What is Thymine (Except in RNA when it is paired with Uracil)
400
The punctuation marks of DNA/RNA. Signal that start and stop of polypeptides.
What are Start/stop codons?
500
The double-helix model explains...
What is Chargaff’s rule of base pairing and how the two strands of DNA are held together
500
The device Rosalind Franklin used to get the image for the DNA model
What is an x-ray machine
500
Inside the nucleus, DNA makes up these
What are chromosomes
500
RNA is made by...
What is the weak hydrogen bonds splitting between the base pairs, and the DNA is “unzipped” to form RNA