Exam (elaborations)
MCB3020 FINAL EXAM QUESTIONS AND ANSWERS
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MCB3020 FINAL EXAM QUESTIONS AND ANSWERS
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Name: Score:233 Multiple choice questions
Term 1 of 233
To allow simultaneous replication of the leading and lagging strands by dimeric DNA pol III,
the DNA of the leading strand has to be folded.
True
False
Term 2 of 233
When RNA polymerase is bound to the lac promoter sequence, transcription of the lac operon
is on.
True
False
Term 3 of 233
The inducer of the lac operon is an isomer of lactose.
True
False
Term 4 of 233
Long-term stationary phase
Phase of rapid cell death and population decrease
Phase marked by sudden decline in genetic diversity
Phase where cells remain in a static state with no changes
Phase during which the population evolves to produce successive waves of genetic
variants
,Term 5 of 233
The condition in the host that results from pathogenic parasitic organism growing and
multiplying within or on the host is called
invasion
spontaneous generation
classification
an infection
Term 6 of 233
The method used in horizontal gene transfer is
crossing over.
nonhomologous recombination.
classification
conjugation
Term 7 of 233
A bacterial genus that is found in large numbers in the intestinal tract of breast-fed infants is
Bifidobacteria
Lactobacilli
Escherichia Coli
Cytosol
Term 8 of 233
Prions are believed to cause _______ diseases.
Genetic
Inflammatory
Neurodegenerative
Autoimmune
,Term 9 of 233
Transcription is turned off by _________.
Induction
Repression
Activation
Enhancement
Term 10 of 233
The lysosome contains ________ enzymes.
proteinaceous
hydrolytic
oxidative
photosynthetic
Term 11 of 233
Enzymes needed to digest all types of macromolecules are found in
ribosomes
peptidoglycan
endoplasmic reticulum
lysosomes
Term 12 of 233
In the Sanger method, examining the electrophoresis gel and reading from bottom to top, one
base at a time, gives the sequence of DNA.
True
False
, Term 13 of 233
Which of the following protects bacteria from lysis in dilute solutions and helps to determine
their cellular morphology or shape?
Peptidoglycan
Plasmids
Chitin
Ribosomes
Term 14 of 233
Which of the following is not a category of symbiosis?
Parasitism
Symbiosis
Communalism
Amensalism
Term 15 of 233
Viroid
A type of bacteria
An infectious agent consisting of only RNA
A non-infectious rna molecule
A type of plant
Term 16 of 233
The oral cavity of humans normally becomes colonized with microorganisms within hours after
birth.
True
False
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