Biology: Placenta, Pollination, and Progesterone
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Questions and Answers

What is the main function of ribosomes?

  • Metabolism regulation
  • DNA replication
  • Cell division
  • Protein synthesis (correct)

What is the role of tRNA in protein synthesis?

  • DNA replication
  • Transcription
  • mRNA synthesis
  • Translation (correct)

How does RNA differ from DNA?

  • RNA is double-stranded, DNA is single-stranded
  • RNA contains deoxyribose sugar, DNA contains ribose sugar
  • RNA has uracil instead of thymine, DNA has thymine (correct)
  • RNA is found only in prokaryotic cells, DNA is found only in eukaryotic cells

Which chromosomes determine the sex of an individual in humans?

<p>Sex chromosomes (B)</p> Signup and view all the answers

What is sexual reproduction?

<p>Reproduction involving the fusion of gametes (B)</p> Signup and view all the answers

Where does transcription occur during protein synthesis?

<p>Nucleus (A)</p> Signup and view all the answers

What is the role of mRNA in protein synthesis?

<p>Provides the template for protein synthesis (D)</p> Signup and view all the answers

How do secondary sexual characteristics differ from primary sexual characteristics?

<p>Secondary sexual characteristics develop during puberty and are not directly involved in reproduction (A)</p> Signup and view all the answers

What contributes to genetic variation among individuals?

<p>Genes, environment, or a combination of both (D)</p> Signup and view all the answers

What is the function of the placenta during pregnancy?

<p>Exchange of nutrients and waste between mother and fetus (C)</p> Signup and view all the answers

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