DNA review worksheet
What are the three parts of a DNA molecule
phosphate doesyribose sugar nitrogenous base
What polymer makes up our characteristics
protein/polypeptide
Sugar in mRNA
ribose
Shape of mRNA
single strand helix
How are DNA and mRNA alike
-4 nucleotides with phosphate group a sugar nitrogenous base -
What happens after the hydrogen bonds are broken
-DNA polymer attaches free-floating nucleotides - Covalently bonded to form two double strands
What 4 bases make up a DNA molecule
Adenine Guanine Thymine Cytosine
WHAT does DNA replicate
a copy of itself
What is the difference between an amino acid and a protein
Amino acid is one small part of a polypeptide chain(protein)
What type of bond holds together the nitrogen bases
hydrogen bond
Amount of strands of mRNA transcripted from the two "unzipped" zip strands of DNA
many
Location of DNA
nucleus
Where in the cell is DNA found
nucleus
Location of mRNA
nucleus & cytoplasm
What type of bond is formed between amino acids
peptide bonds
The order of nitrogen bases (ACCG) determines the type of _ that is assembled
protein
What is the importance of the order of base pairs in a DNA molecule
they code for specific amino acids in exact sequence to protein
Where must an mRNA attach before protein production can begin
to a ribosome
What scientist are credited with the base pairing rules a) Rosinlen b)Waston c) Changaff d) Crick
waston changaff crick
How many pairs of chromosomes does a human have in their skin cells
23
How many bases are needed to specify an mRNA codon
3
Bases of mRNA
A U G C
The difference between chromatin and chromosomes -Chromatin is
DNA not coiled (unwound)
During DNA replication what causes the hydrogen bonds to break
DNA polymer
Sugar in DNA
Deoxyribose
WHEN does DNA replicate
Synthesis phase of cell cycle
How does mRNA get out of the nucleus
Through the nuclear pores
What is located at each end of a tRNA molecule
anticodon
How are the accuracy of DNA and mRNA codes assured
checked by DNA & RNA polymers
The difference between chromatin and chromosomes - Chromosomes is
condensed DNA
What does DNA stand for
deoxyribonucleic acid
What is the shape of a DNA molecule
double helix
A segment of DNA that codes for a protein is called a
gene