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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: Endocrine Glands, The Pituitary, Thyroid and Parathyroid Glands

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1.
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)
2.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Chargaff's Rules of DNA Base Pairing?
Adenine bonds with Guanine via three hydrogen bonds
Uracil replaces Thymine in the double helix of nuclear DNA
The percentage of %A + %T always equals 50% in all organisms
In any double-stranded DNA molecule, the percentage of Adenine equals Thymine (%A = %T) and Guanine equals Cytosine (%G = %C), with total purines equaling pyrimidines (%A + %G = %T + %C = 50%)
3.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Transcription and Translation during Protein Synthesis?
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
DNA polymerase transcribes mRNA in the cytoplasm
Translation begins at the UAA stop codon
4.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Geological Dating and Index Fossils?
Index fossils must be restricted to a single local rock formation
Index fossils are formed exclusively in intrusive igneous granite
Index fossils must exhibit a wide geographic distribution and a short, well-defined chronological stratigraphic range to accurately correlate sedimentary rock layers
Index fossils lived continuously throughout all geological eras
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