Hemoglobin Is a Model System to Illustrate the Deleterious Effects

question 44

Multiple Choice

Hemoglobin is a model system to illustrate the deleterious effects of mutations.Which of the following statements about deleterious mutations in human hemoglobin genes is false?

• A) Hemoglobin A and hemoglobin S differ at only one amino acid position
• B) In hemoglobin S, the substitution of valine for glutamic acid causes an aggregation of hemoglobin molecules not found in hemoglobin A
• C) The molecular difference between hemoglobin A and hemoglobin S was identified by protein sequence before nucleotide sequence
• D) The valine to glutamic acid substitution is the only amino acid change so far identified in the b chain of hemoglobin
• E) Homozygous (Hb^sb/Hb^sb) leads to severe hemolytic anemia, which is often fatal.

Explain how environmental factors and external applications of hormones can influence plant growth and development.

Identify the involvement of phytochromes in detecting light signals and mediating plant responses to light.

Understand the concept and implications of hormone signal transduction in plants.

Recognize the specialized roles of plant hormones in stress responses and developmental processes.

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Definitions:

Coordination

The organized arrangement of efforts and resources among different persons or groups to achieve a common goal.

Supervision

The process of overseeing and managing employees to ensure they are working effectively towards organizational goals.

Flatter Structures

Organizational structures characterized by fewer hierarchical levels, encouraging better communication and faster decision-making processes.

Decision-making

The process of choosing the best alternative for reaching objectives.