Genetics Flashcards
mRna has
codons
mRNA is synthesized in
transcription
mrna is synthesized in the
nucleus
blank codons equal one amino acid
three
TRNA brings amino acids to the
ribosome
polypeptide is a sequence of
amino acids
TRNA has
anti-codons
TRNA transfers amino acids during
translation
ribosomes are the site where
translation takes place
One amino acid equals blank nitrogen bases
3
there are blank different amino acids
20
what bond Binds amino acid together
peptide
A DNA nucleotide may contain
deoxyribose, thymine, and a phosphate group
levels of organization within a cell of multicellular organisms
cell, nucleus, chromosome, gene
The coded information of a DNA molecule is determined by the
sequence of amino acids
all cells from a fertilized egg have
identical DNA
sudden change in the DNA of a chromosome can usually be passed on to future generations of the change occurs in a
Sex cell
New in heritable characteristics would be at least likely to result from
mutations which occur in muscle cells and skin cells
what is the function of messenger RNA molecules in the synthesis of proteins
they carry information that determines the sequence of amino acids
functions of DNA
Controls functions of cell, contains instructions to make proteins
nucleotides
DNA made of repeating subunits
RNA messenger
A single strand, ribose sugar, doesn’t contain base thymine, contains base uracil, follows base pair rule (a-u)
transcription
occurs in the nucleus of the cell
how transcription works
A DNA strand separates and serves as a template for RNA assembly, free M RNA nucleotides match up to exposed nucleotides on DNA strand, M RNA strands leaves DNA strand when “stop codon” is reached. The M RNA strand carries code for production of one polypeptide
M RNA carries instructions from
nucleus to ribosomes
translation
occurs in cytoplasm of the cell, at the ribosome. RNA is turned into proteins (happens in ribosomes)
