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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?

Increased fluidity Signup and view all the answers

What is the primary function of triacylglycerols in the body?

Energy storage Signup and view all the answers

What is the characteristic of amphipathic molecules in solution?

Heads are hydrophilic and tails are hydrophobic Signup and view all the answers

What is the primary function of glucose in cells?

Energy production Signup and view all the answers

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

Catalyzing the formation of peptide bonds Signup and view all the answers

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

DNA has a hydrogen, while RNA has a hydroxyl group Signup and view all the answers

What is the function of messenger RNA (mRNA)?

Acting as messengers between DNA sequences and final protein sequences Signup and view all the answers

What is the characteristic structure of DNA?

A double-stranded helix Signup and view all the answers

What is the function of transfer RNA (tRNA)?

Binding to specific amino acids to deliver them to the ribosome during protein translation Signup and view all the answers