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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 1 Quiz: Structure of Earth, Geological Time and Structural Geology

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1.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Hormonal Regulation of Blood Glucose (Insulin and Glucagon)?
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
Insulin stimulates the breakdown of liver glycogen into glucose
Alpha cells secrete insulin to elevate blood glucose levels
Glucagon is secreted by the adrenal cortex under stress
2.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Parthenogenesis in Honeybees (Apis mellifera)?
Female worker bees develop parthenogenetically without fertilization
Drones produce sperm cells by meiotic division
The queen honeybee produces haploid drones (males, n) from unfertilized eggs via parthenogenesis, whereas diploid worker and queen females (2n) arise from fertilized eggs
Male drones arise from fertilized diploid zygotes (2n)
3.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Transcription and Translation during Protein Synthesis?
DNA polymerase transcribes mRNA in the cytoplasm
tRNA molecules contain codons identical to DNA triplets
RNA polymerase synthesizes mRNA from the antisense DNA template strand in the 5' to 3' direction, and translation occurs on ribosomes where tRNA anticodons bind mRNA codons
Translation begins at the UAA stop codon
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