Honors Biology Chapter 2 Test Questions and Answers Already Passed
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Grado
Honors Biology
Institución
Honors Biology
Honors Biology Chapter 2 Test
Questions and Answers Already Passed
What is the role of nucleic acids in cells?
Nucleic acids store and transmit genetic information; DNA carries genetic instructions, and
RNA helps in protein synthesis.
How do enzymes affect the rate of a chemical react...
Honors Biology Chapter 2 Test
Questions and Answers Already Passed
What is the role of nucleic acids in cells?
✔✔ Nucleic acids store and transmit genetic information; DNA carries genetic instructions, and
RNA helps in protein synthesis.
How do enzymes affect the rate of a chemical reaction?
✔✔ Enzymes increase the rate of a chemical reaction by lowering the activation energy needed
for the reaction to proceed.
What is a molecule’s functional group, and why is it important?
✔✔ A functional group is a specific cluster of atoms within a molecule that is responsible for the
molecule's characteristic reactions and properties.
How does water’s polarity contribute to its role as a solvent?
✔✔ Water’s polarity allows it to dissolve many substances by surrounding and interacting with
various ions and molecules.
1
,What is a buffer, and how does it help maintain pH balance?
✔✔ A buffer is a substance that neutralizes small amounts of acids or bases to maintain a stable
pH in a solution.
What is the main function of lipids in biological systems?
✔✔ Lipids primarily serve as long-term energy storage, structural components of cell
membranes, and signaling molecules.
What are the two main types of nucleic acids, and what are their functions?
✔✔ DNA stores and transmits genetic information, while RNA plays a role in protein synthesis
and gene expression.
What is the primary difference between prokaryotic and eukaryotic cells in terms of their genetic
material?
✔✔ Prokaryotic cells have their genetic material in a nucleoid region without a membrane, while
eukaryotic cells have their genetic material enclosed in a nucleus.
What is the role of phospholipids in the cell membrane?
2
, ✔✔ Phospholipids form a bilayer that makes up the cell membrane, with hydrophilic heads
facing outward and hydrophobic tails facing inward, creating a semi-permeable barrier.
How do hydrogen bonds contribute to the properties of water?
✔✔ Hydrogen bonds between water molecules contribute to water’s high boiling point, surface
tension, and ability to dissolve other substances.
What are the three main types of bonds that can form between atoms?
✔✔ The three main types of bonds are ionic, covalent, and hydrogen bonds.
What is the role of enzymes in biological reactions?
✔✔ Enzymes act as catalysts to speed up biochemical reactions by lowering the activation
energy required.
What is a polar molecule?
✔✔ A polar molecule has a partial positive charge on one end and a partial negative charge on
the other end due to uneven distribution of electrons.
How does a hydrogen bond differ from a covalent bond?
3
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