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MCB3020 FINAL EXAM QUESTIONS AND ANSWERS

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  • MCB3020
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  • MCB3020

MCB3020 FINAL EXAM QUESTIONS AND ANSWERS

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  • September 20, 2024
  • 194
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • MCB3020
  • MCB3020
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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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