I need Protein
-ase means
enzyme
Repeating units in DNA and RNA (building blocks)-
nucleotides
bond between two base pairs-
hydrogen bond
DNA is double stranded which helps it-
copy itself
Enzymes only work with specific substrates because-
they have a specific active site
Enzymes impact chemical reactions by-
speeding them up
Chargaff's rule states-
A pairs with T and C pairs with G
If I am looking at a DNA sample, the total number of Adenine, Thymine, Cytosine, and Guanine bases adds up to-
100%
DNA -> C T C A
RNA -> ?
G A G U
Importance of maintaining homeostasis-
body cells and enzymes only tolerate a narrow range in pH & temperature
monomer for protein-
amino acid
Franklin's diffraction image of DNA helped determine-
double helix
The "rungs" of DNA-
nitrogen bases
A. B.
DNA --> mRNA --> protein
Where does A. occur?
nucleus
Given the amino acid - Histidine, what DNA sequence would code for that?
GTC
This enzyme adds complementary base pairs to build a new DNA strand-
DNA Polymerase
Watson and Crick won a noble prize for-
creating a model of DNA (nucleotides, 4 bases, and hydrogen bonds)
3 parts of a nucleotide-
phosphate, sugar, nitrogen base
DNA to mRNA is...
Transcription
mRNA = GUA
amino acid= ?
Valine
Stomach acid (pepsin) works best at this pH-
2.5 or 3
Why is DNA so important (3 reasons)?
genetics, blueprints, and make proteins
What are the 3 steps of DNA Replication?
1- Helicase unzips DNA
2- Polymerase builds new DNA strand
3- Ligase glues fragments together
What is the relationship between DNA & proteins?
DNA determines amino acid sequence of each protein
1800 total bases, 425 are thymine, how many cytosine bases are there?
475