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Biology & Geology (STEM)

Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Quiz

Lesson 2: DNA Structure, Replication and DNA Repair Enzymes — Lesson quiz

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1.
If a double-stranded DNA molecule contains 20% Cytosine, what is the percentage of Adenine?
40%
60%
20%
30%
2.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Hormonal Regulation of Blood Glucose (Insulin and Glucagon)?
Insulin stimulates the breakdown of liver glycogen into glucose
Glucagon is secreted by the adrenal cortex under stress
Alpha cells secrete insulin to elevate blood glucose levels
Beta cells of the islets of Langerhans secrete insulin to lower blood glucose by stimulating cellular uptake and glycogen synthesis, while alpha cells secrete glucagon to raise blood glucose by glycogenolysis
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