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20 terms

Micro Chapter 7

STUDY
PLAY
The two strands of DNA are bonded to one another by
HYDROGEN BONDS
GCCCAAAG is a molecule of
cannot tell as written
DNA is characterized by what feature?
Deoxyribose & Thymine
DNA replication is
semiconservative
The term antiparallel
refers to the opposite orientation of the two strands in DNA
The specific sequence of nucleotides in the DNA to which the RNA polymerase binds is the
promoter region
How many nucleotides are in a codon?
3
There are ___ codons to code for the 20 possible amino acids.
61
May be or is an RNA molecule
GGGCCCA AND GCCCUUA
The placement of the amino acid during translation is determined by the
complementarity of the codon-anticodon
A stop codon
codes for no amino acid
Gene regulation may entail
Turning on genes only when needed
Turning off genes when not needed
Turning on or off entire groups of genes
The set of genes in bacteria that are linked together and transcribed as a single unit is referred to as an
operon
The molecules that bind to a repressor and cause it to no longer bind to the operator are called
inducers
Adenine binds to thymine via 3 hydrogen bonds
FALSE
one end of a strand of DNA is different from the other end
TRUE
DNA replication is usually unidirectional
FALSE
There are 4 functional types of RNA
FALSE
The anticodon determines which amino acid is linked to its tRNA
TRUE
Why is it a good idea for a bacterial cell to be able to utilize glucose FIRST as an energy source (until it's used up, THEN switch to lactose?
Glucose is an easier compound to break down and obtain energy from than lactose & it's about conservation of energy-why expend the energy to make the extra enzymes for breaking down lactose when glucose is right there and doesn't need to extra enzymes for breakdown.