Biology Chapter 1 Quiz
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Questions and Answers

Which statement about cell theory is correct?

  • All living organisms are composed of one or more cells. (correct)
  • Cells can arise from non-living materials.
  • Cells function independently of their environment.
  • All cells have a nucleus.

Which structure is primarily involved in the active transport of substances across the cell membrane?

  • Lysosomes
  • Mitochondria
  • Proteins embedded in the membrane (correct)
  • Ribosomes

What distinguishes prokaryotes from eukaryotes?

  • Only prokaryotes have a cell membrane.
  • Prokaryotes lack ribosomes.
  • Eukaryotes have chloroplasts while prokaryotes do not.
  • Prokaryotes do not possess a defined nucleus. (correct)

During photosynthesis, which of the following are produced?

<p>Oxygen and glucose (C)</p> Signup and view all the answers

How do heterotrophs obtain energy?

<p>By consuming other organisms (D)</p> Signup and view all the answers

Which of the following is NOT considered a characteristic of living things?

<p>Ability to conduct electricity (B)</p> Signup and view all the answers

What is the significance of valence electrons in chemical bonding?

<p>They are involved in forming chemical bonds with other atoms. (C)</p> Signup and view all the answers

In the context of the pH scale, what would be classified as a neutral substance?

<p>Pure water with a pH of 7 (D)</p> Signup and view all the answers

Which term best relates to the necessary energy to start a chemical reaction?

<p>Activation energy (D)</p> Signup and view all the answers

In the chemical equation CO₂ + H₂O → H₂CO₃, which component is the reactant?

<p>Both A and C (B)</p> Signup and view all the answers

Flashcards

Raw Data

The original, unprocessed information collected during an experiment.

Hypothesis

A testable prediction about the relationship between variables.

Variable

Any factor that can change or be changed during an experiment.

Theory

A well-substantiated explanation of some aspect of the natural world, supported by a large body of evidence.

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Research Question

A question that can be investigated through scientific research.

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Cell Theory

The idea that all living things are made up of cells, and that all cells come from pre-existing cells.

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Electron Microscope

A type of microscope that uses a beam of electrons to create images of extremely small objects, revealing details not visible with light microscopes.

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Eukaryotic Cell

A type of cell that has a membrane-bound nucleus, containing its genetic material (DNA).

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Prokaryotic Cell

A type of cell that does not have a membrane-bound nucleus, and its genetic material is floating freely within the cytoplasm.

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Photosynthesis

The process by which plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into glucose (sugar) and oxygen.

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