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Biol 230 Exam #3 @ JCCC: Questions With Solutions A+
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Biol 230 Exam #3 @ JCCC: Questions With Solutions A+
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Biol 230 Exam #3 @ JCCC: Questions With Solutions A+Knowing the genome of an organism Right Ans - helps us identify diseases
Chromosomes Right Ans - where "blueprint" genetic information is
contained
Double stranded DNA consists of how many bases Right Ans - 4
Bacterial genome often forms in what shape Right Ans - circular; lots of
DNA in a compact space
Genome of a sequence Right Ans - promotor for regulator gene - regulator
gene - (promoter - operator - structural gene) OPERON - mRNA - protein
Promoter Right Ans - gene regulation, control sequence
Operon Right Ans - genes existing in sequence
Gene Right Ans - information encoded by DNA that gives an RNA product:
mRNA (the majority of RNA products
mRNA synthesis Right Ans - protiens
Introns Right Ans - non-coding genes in humans
Bacteria can have genomic chromosomes as well as Right Ans - plasmids
Plasmids Right Ans - can confer resistance to multiple antibiotics; can have
resistance to 5 or more antibiotics; can acquire antibiotic resistance gene
How do we get so many species Right Ans - error rate of DNA replication
Mutation Right Ans - difference between preexisting parent cell by at least
one base pair
DNA replication efficient because Right Ans - genes and proteins are
working together; can cause disease w/in 24-48 hrs.
, helicase enzyme Right Ans - unwinding DNA using ATP while extending
growing strand
DNA polymerase enzyme Right Ans - adds nucleotides to DNA; copies DNA
telomerase enzyme Right Ans - forms the ends of chromosomes
semiconservative replication Right Ans - each daughter cell receives one
parent strand and one newly synthesized strand
replication fork Right Ans - this forms do to unwinding by helicase
DNA synthesis begins Right Ans - at the orgin
DNA or RNA can collect nucleotides only from what direction Right Ans - 5'
to 3'
5' end Right Ans - phosphate
3' end Right Ans - hydroxyl
what helps in initiation of DNA synthesis Right Ans - primers
leading strand synthesize Right Ans - continuously in 5' to 3'
lagging strand synthesize Right Ans - discontinuously in Okazaki fragments
from 5' to 3'
replication ends at Right Ans - terminus
enzymes used in elongation Right Ans - DNA polymerase 3 and DNA
polymerase 1; 1 comes after 3
DNA polymerase 3 Right Ans - extends DNA sequence (primer)
DNA polymerase 1 Right Ans - replaces RNA primers
we do not have a complete segment of DNA w/o a Right Ans - terminus
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