Biology: Building Blocks of Life
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Questions and Answers

What is the second level of the hierarchy of structure in living organisms?

  • The cell and its organelles
  • Supermolecular complexes
  • Monomeric units
  • Macromolecules (correct)

What is the term for the ability of water to dissolve both ionic and non-ionic molecules?

  • Specific heat
  • Cohesion
  • Solubility (correct)
  • Versatility

What is the main component of bilayer membranes in cells?

  • Cholesterol
  • Fatty acids
  • Phospholipids (correct)
  • Triacylglycerols

What is the effect of increased cholesterol in a membrane?

<p>Increased fluidity (B)</p> Signup and view all the answers

What is the primary function of triacylglycerols in the body?

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

What is the characteristic of amphipathic molecules in solution?

<p>Heads are hydrophilic and tails are hydrophobic (D)</p> Signup and view all the answers

What is the primary function of glucose in cells?

<p>Energy production (C)</p> Signup and view all the answers

What is the primary function of ribosomal RNA (rRNA)?

<p>Catalyzing the formation of peptide bonds (D)</p> Signup and view all the answers

What is the difference between the sugar molecules in DNA and RNA?

<p>DNA has a hydrogen, while RNA has a hydroxyl group (A)</p> Signup and view all the answers

What is the function of messenger RNA (mRNA)?

<p>Acting as messengers between DNA sequences and final protein sequences (D)</p> Signup and view all the answers

What is the characteristic structure of DNA?

<p>A double-stranded helix (C)</p> Signup and view all the answers

What is the function of transfer RNA (tRNA)?

<p>Binding to specific amino acids to deliver them to the ribosome during protein translation (D)</p> Signup and view all the answers

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