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True/False Quiz
1. Carbon is considered the foundational building block for all biological macromolecules, such as proteins and DNA.
- True
- False
View Answer & Explanation
Correct Answer: True
Explanation: The document explicitly states, ‘Carbon is the foundational building block for all these macromolecules’ which include proteins, nucleic acids (like RNA and DNA), carbohydrates, and lipids.
2. To satisfy the octet rule, a carbon atom typically forms up to four covalent bonds with other atoms.
- True
- False
View Answer & Explanation
Correct Answer: True
Explanation: The document explains that carbon has four electrons in its outermost shell and, ‘To satisfy the octet rule… carbon atoms can form up to four covalent bonds with other atoms.‘
3. Hydrocarbons are defined as organic molecules composed entirely of carbon and oxygen.
- True
- False
View Answer & Explanation
Correct Answer: False
Explanation: The document defines hydrocarbons as ‘organic molecules made entirely of carbon and hydrogen,’ not carbon and oxygen.
4. Carbon-carbon single bonds allow for free rotation around the bond’s axis, while double bonds result in a planar arrangement and cannot rotate.
- True
- False
View Answer & Explanation
Correct Answer: True
Explanation: The document states, ‘Single bonds, like those in ethane, are able to rotate. Double bonds, like those in ethene, cannot rotate, so the atoms on either side are locked in place,’ and also describes double bonds leading to a ‘planar, or flat’ shape.
5. Aromatic hydrocarbons consist of closed rings of carbon atoms that have only single bonds.
- True
- False
View Answer & Explanation
Correct Answer: False
Explanation: The document defines aromatic hydrocarbons as consisting of ‘closed rings of carbon atoms that have alternating single and double bonds,’ in contrast to aliphatic hydrocarbons which have only single bonds in their rings.
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