In Molecular Biology Labs Researchers Often Use E

question 43

Multiple Choice

In molecular biology labs researchers often use E.coli strains that are RecA minus (recA⁻) when transforming a cloned gene into a plasmid which explains why
(I) a Rec A-strain would have fewer replication errors.
(II) a Rec A-strain would have less opportunity forming DNA mutations.
(III) a Rec A-strain would increase error repair.

• A)I only.
• B)II only.
• C)III only.
• D)I,II
• E)II,III

Identify the role of heat treatment and catalysts in changing the properties of plastics.

Understand the classification and significance of steel types.

Comprehend the characteristics of chromium vanadium steels.

Recognize the importance of copper in enhancing the corrosion resistance of steel.

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Definitions:

CLIA-waived

Refers to tests that are simple laboratory examinations and procedures that have an insignificant risk of an erroneous result under the Clinical Laboratory Improvement Amendments.

Bilirubin

A yellow substance that is produced during the normal breakdown process of heme in vertebrates and is eliminated through the bile.

Urobilinogen

A byproduct of bilirubin reduction that is present in urine and stool, used as an indicator in diagnosing liver and blood disorders.

Leukocytes

White blood cells that are part of the immune system, protecting the body against infection and disease.