EXAM 2026-2027 ACTUAL COMPLETE REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
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chromosome reciprocal translocation - ANSWER -
reciprocal exchange of
segments between two nonhomologous
chromosomes
may cause fetus to be aborted
Meischer - ANSWER -First to isolate DNA
1869 isolated nuclei from pus
"nuclein" 20 yrs later isolated
into "nucleic acid" deoxyribo
"nucleic acid" DNA ribo
"nucleic acid" = RNA
Chargaff's rule A=T C=G
Watson, Crick, Franklin, & Williams -> DNA structure
Central Dogma - ANSWER -theory that states that, in cells,
information only flows from DNA to RNA to proteins
replication
transcription
translation
,*retroviruses & bacteriophages * reverse
transcriptase
goes the opposite
direction
DNA synthesis & replication - ANSWER -helicase -
unwinds double helix
DNA polymerase - locates A & T and G&C's and
combine them
okazaki fragments - seperate
fragments of DNA
ligase - glue okazaki fragments
together
transcription: RNA synthesis - ANSWER -messenger RNA
(mRNA) is copied from DNA; intervening sequences (introns)
are removed and remaining portions (exons) are ready to be
translated
introns - ANSWER -sequence of DNA that is not involved in
coding for a protein
exons - ANSWER -expressed sequence of DNA; codes for a
protein
translation - ANSWER -proteins are synthesized from mRNA by
ribosomes (which are composed of ribosomal RNA, or rRNA,
and proteins), which read from a universal triplet code (i.e.,
codons)
, replication - ANSWER -DNA is copied from the other DNA by
unzipping the helix and pairing new nucleotides with the proper
bases on each separated side of the original DNADNA uses
itself to make copies (S stage); semi-conservative model
helicase - unzips DNA
helicase - ANSWER -An enzyme that untwists the double helix
of DNA at the
replication
forks.
DNA polymerase - ANSWER -Enzyme involved in DNA
replication that joins
individual nucleotides to produce a
DNA molecule
Okazaki fragments - ANSWER -Small fragments of DNA
produced on the lagging strand during DNA replication, joined
later by DNA ligase to form a complete strand.
ligase - ANSWER -An enzyme that connects two fragments of
DNA to make a
single
fragment
DNA replication in Bacteria - ANSWER -Replication of the
circular chromosome,