Ques:Q: Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across what structure? Read this paragraph and choose the correct option from the provided answers: Illustration of the two types of vesicle transport, exocytosis and endocytosis. Endocytosis and exocytosis are types of vesicle transport that carry very large molecules across the cell membrane. Choices: - cell substrate - the heart - dermis - cell membrane A:

Ans:cell membrane
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Ques:Q: What is the term for land that has permanently frozen soil? Read this paragraph and choose the correct option from the provided answers: Permafrost is land with permanently frozen soil. Choices: - ice desert - snow-field - Arctic - permafrost A:

Ans:permafrost
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Ques:Q: What kind of reaction, in general, keeps stars shining? Read this paragraph and choose the correct option from the provided answers: The energy from fusion reactions keeps the star shining. Choices: - magnetism - fission - evolution - fusion A:

Ans:fusion
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Ques:Q: Name a carbonyl in which the carbon atom is bonded to one carbon atom and one hydrogen atom (or two hydrogen atoms). Read this paragraph and choose the correct option from the provided answers: An aldehyde is a carbonyl in which the carbon atom is bonded to one carbon atom and one hydrogen atom (or two hydrogen atoms, see below). Because the hydrogen atom is so small, the partial positive charge on the carbonyl carbon is very easy for other molecules to approach, making aldehydes a particularly reactive type of carbonyl. Aldehydes are versatile reactants for a wide variety of organic syntheses. Many aldehydes also have distinctive flavors and aromas. For example, the flavor of cinnamon is primarily due to the molecule cinnamaldehyde, and vanillin is the aldehyde most responsible for the smell and taste of vanilla extract. Choices: - ketone - acetylcholine - ester - aldehyde A:

Ans:
aldehyde
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