A Competent Bacterial Strain That Has the Genotype A^- B^-

question 25

Multiple Choice

A competent bacterial strain that has the genotype a^- b^- c⁺ is transduced with a P1 phage carrying a fragment of donor chromosome with the a⁺ b⁺ c^- alleles. The following number of transductants were found after screening for the selectable marker a⁺. $$\begin{array} { | c | c | } \hline \text { Transductant Genotyp } & \text { Number } \\\hline a + b - c + & 160 \\\hline a + b + c + & 360 \\\hline a + b + c - & 460 \\\hline a + b - c - & 20 \\\hline\end{array}$$ Which of the following conclusions is false?

• A) The selected marker screen will inhibit growth of transductants with the genotype a^- b⁺ c^- .
• B) The transduction frequency between a and b is 82%.
• C) Gene a and gene b are closer together than gene a and gene c.
• D) The gene order is acb.
• E) The transduction frequency between a and c is 48%.

Recognize the various cognitive impairments associated with neurocognitive disorders, including Alzheimer's.

Identify symptoms and behavioural manifestations of Alzheimer's and related disorders.

Distinguish between early-onset and late-onset Alzheimer’s disease in terms of disease progression.

Comprehend the genetic factors and risk alleles associated with Alzheimer's disease.

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Definitions:

Caudate Nucleus

A structure within the brain involved in various processes such as voluntary movement coordination and learning.

Lateral Fissure

A deep groove on the surface of the brain separating the temporal lobe from the frontal and parietal lobes.

Cerebrum

The cerebrum is the largest part of the brain, responsible for cognitive functions such as thought, memory, and decision-making.

Temporal Lobe

A region of the brain located on the sides of the cerebral hemisphere, involved in processing auditory information and encoding memory.