EXAM 2026-2027 ACTUAL COMPLETE REAL EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
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What is a central role that ATP plays in cellular metabolism? -
ANSWER-ATP
provides energy coupling between exergonic and
endergonic reactions
Enzymes are ___________ that increase the rate of chemical
reactions by
lowering _______________ barriers. - ANSWER-catalysts;
activation energy
In DNA replication, the resulting daughter molecules contain
one strand of the
original parental DNA and one new strand. what is the
explanation for this
phenomena? - ANSWER-DNA replication is
semiconservative
Leading strand vs lagging strand in DNA replication - ANSWER-
the leading strand is synthesized continuously in the 5' --> 3'
direction, while the lagging strand is synthesized
discontinuously in the 5' --> 3' direction
,In nucleotide excision repair, _________________ is involved
in cutting out a
segment of a damaged DNA - ANSWER-
Nuclease
nuclease - ANSWER-A DNA cutting enzyme that excises
damaged DNA.
Nucleotide Excision Repair (NER) - ANSWER-Repairs
bulky lesions that
alter/distort double
helix
The results from beadle and Tatum's experiments with
Neurospra provided
strong evidence of the hypothesis __________________. -
ANSWER-One
gene codes one
polypeptide
start codon - ANSWER-AUG
stop codon - ANSWER-UAA, UAG, UGA
What occurs during transcription? - ANSWER-RNA is
synthesized
,According to the central dogma, what are the molecules
involved in the flow of
information in a cell? - ANSWER-DNA --> mRNA -
-> Proteins
TATA box - ANSWER-A promoter DNA sequence crucial
in forming the
transcription initiation
complex.
What best describes the significance of the TATA box in the
promoters of eukaryotes? - ANSWER-It is the recognition site
for the binding of a specific transcription factor
A chemical bond can form if two atoms are so unequal in their
attraction for valence electrons that one atom strips an electron
completely from the other, which is called _____________ and
that atoms that are positively charged are called
_________________. - ANSWER-ionic bond; cations
On a hypothetical island, the squirrel population went from
having medium sized tails to having very short tails to avoid
being captured by predators grabbing their tails on the ground.
This is an example of ______________________. - ANSWER-
directional selection
bottleneck effect - ANSWER-A change in allele frequency
following a dramatic reduction in the size of a population;
sudden change in environments that alters gene frequency of a
population
, The fitness of a phenotype depends o how common it is in
the population is
______________________. - ANSWER-Frequency-
dependent selection
____________________________ is direct competition among
individuals of one sex (often males) for mates of the opposite
sex. - ANSWER-intersexual selection
Fossils found in state reveal that - ANSWER-Older strata carry
fossils that differ
greatly from living
organisms
________________- explain the fossil record and the current
diversity of life
with recognition of gradual evolutionary change but no
support from modern
genetics using classic example of long neck giraffe -
ANSWER-Lamarck
What are adaptations? - ANSWER-inherited characteristics of
organisms that
enhance their
survival
Natural selection is
______________________________________. - ANSWER-The