Takes mRNA out of the nucleus, and also tRNA picks up the correct amino acid whose base pairs match and carries them to the mRNA strand in the ribosome.
100
DNA is copied during a process called
Replication
100
The process where mRNA copies the genetic code from DNA is called __________.
Transcription
100
All mutations are expressed in the phenotype? TRUE OR FALSE
why ?
FALSE. Some mutations cause no change, or they may be in a non coding region.
200
What does DNA stand for?
Deoxyribonucleic Acid
200
If the mRNA codon is UAG, then what is its complimentary tRNA anticodon
AUC
200
Where does DNA replication take place?
Nucleus
200
The instructions for assembling proteins are contained in _______ ?
genes
200
Mutation involving 1 nucleotide
Point mutation
300
What is a nucleotide in DNA ?
deoxyribose + phosphate group + guanine
or
deoxyribose + phosphate group + cytosine
or
deoxyribose + phosphate group + adenine
deoxyribose + phosphate group + thymine
300
what molecule holds our genetic code ?
DNA
300
DNA replication results in two DNA molecules, __________.
HINT : semi conservative
each with one new strand and one original strand.
300
Where does translation take place and what is it ?
In the cytoplasm at a ribosome, and it is when mRNA is used to make proteins.
300
What is the cause of sickle cell anemia ?
Missense Mutations. Cells have a different sequence of amino acids than normal cells.
400
What are 2 differences between DNA and RNA ?
DNA is double stranded, RNA is a single strand
DNA has Thymine, RNA has uracil
DNA stays in the nucleus, mRNA leaves the nucleus
400
Which nitrogenous base would never be found in RNA?
Thymine
400
One strand of DNA has a base sequence of AGCTA what is the complimentary base sequence
TCGAT
400
What are the types of RNA used during protein synthesis ?
mRNA, tRNA, & rRNA
400
What kind of point mutation causes an amino acid to become a stop codon ?
Nonsense mutation
500
What is Chargaff’s Rule ?
in DNA the quantity between the bases A and T and between the bases G and C is equal. 1:1 ratio
so if you have 20% A, T must be 20% and G C would each be 30%
500
If a sequence of codons on DNA is A-T-G-A-A-C-G-G-T, what is the corresponding strand of mRNA?
U-A-C-U-U-G-C-C-A
500
What enzyme unzips the 2 strands of DNA to begin DNA replication ?
Helicase breaks the Hydrogen bonds
500
Using your amino acid chart, if the tRNA anticodon is CGC, then what is the amino acid?
Alanine
500
TRUE OR FALSE. Mutations in both the germ and somatic cells will be passed on to offspring.
FALSE. Only mutations in germ cells can be passed on. Mutations in somatic cells will not.