Biology Chapter 6 Quiz
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Questions and Answers

Which of the following properties of water allows it to support life on earth?

  • Water sinks as it freezes.
  • Water is a poor conductor of heat.
  • Water acts as a universal solvent. (correct)
  • Water has a low surface tension.

    • Which of the following substances contains nitrogen in addition to carbon, oxygen, and hydrogen?

  • Glycine (correct)
  • Testosterone
  • Glucose
  • Ethanol

    • What is the term for maintaining constant internal conditions in an organism?

  • Adaptation
  • Metabolism
  • Evolution
  • Homeostasis (correct)

    • What trace element deficiency is associated with goiter, characterized by an enlarged thyroid?

    <p>Iodine</p> Signup and view all the answers

    Which statement correctly describes the difference between Carbon 12 and Carbon 14?

    <p>They have the same number of protons but different masses.</p> Signup and view all the answers

    Which scientist is known for the discovery of the DNA double helix structure?

    <p>Watson and Crick</p> Signup and view all the answers

    What technique did Rosalind Franklin use to study DNA structure?

    <p>X-ray Crystallography</p> Signup and view all the answers

    Which scientists studied pneumonia bacteria and made observations about transformation?

    <p>Frederick Griffith</p> Signup and view all the answers

    Why are viruses classified as non-living parasites?

    <p>They require a host for reproduction.</p> Signup and view all the answers

    What are the non-coding segments of eukaryotic DNA called that are removed from mRNA?

    <p>Introns</p> Signup and view all the answers

    What amino acid corresponds to the codon UUA?

    <p>Leu</p> Signup and view all the answers

    Which of the following codons is identified as a stop codon?

    <p>UAA</p> Signup and view all the answers

    What is the amino acid sequence for the mRNA codon AUG-AUC-GCC?

    <p>Met-Ile-Ala</p> Signup and view all the answers

    Which mRNA codon would result in the amino acid Asparagine (Asn)?

    <p>AAC</p> Signup and view all the answers

    An mRNA sequence contains the codon sequence 5'AUG-AAG-GUC-3'. What is the resulting amino acid sequence?

    <p>Met-Lys-Val</p> Signup and view all the answers

    What is the term for the triplet sequence of nucleotides found in mRNA?

    <p>Codon</p> Signup and view all the answers

    Which type of viral reproductive cycle results in the destruction of the host cell?

    <p>Lytic</p> Signup and view all the answers

    What structures facilitate communication between plant cells?

    <p>Plasmodesmata</p> Signup and view all the answers

    Cytosine and Thymine are classified as which type of nitrogenous bases?

    <p>Pyrimidines</p> Signup and view all the answers

    Who is credited with first identifying 'cells' using a simple microscope?

    <p>Robert Hooke</p> Signup and view all the answers

    Which tool is best for studying internal structures of a pollen grain at a magnification of 8,000 times?

    <p>transmission electron microscope</p> Signup and view all the answers

    Which structure is not found in a prokaryotic cell?

    <p>a nucleus</p> Signup and view all the answers

    What happens to the surface area to volume ratio as cell size increases?

    <p>decreases</p> Signup and view all the answers

    Which organelle is involved in the synthesis of oils, phospholipids, and steroids?

    <p>smooth endoplasmic reticulum</p> Signup and view all the answers

    Which structures are found in plant cells but not in animal cells?

    <p>chloroplasts and cell walls</p> Signup and view all the answers

    What type of intracellular structure would be abundant in an immune cell producing thousands of antibodies?

    <p>rough ER</p> Signup and view all the answers

    In Tay-Sachs disease, which cellular organelle is not functioning properly?

    <p>the lysosome</p> Signup and view all the answers

    Which of the following statements is true regarding cell fractions?

    <p>It can separate cellular components based on density.</p> Signup and view all the answers

    Which part of the animal cell is responsible for producing proteins?

    <p>Rough endoplasmic reticulum</p> Signup and view all the answers

    What is the function of the Golgi apparatus in an animal cell?

    <p>Modification and packaging of proteins</p> Signup and view all the answers

    Which component of the animal cell's plasma membrane is primarily involved in cell recognition?

    <p>Glycoproteins</p> Signup and view all the answers

    What is the primary role of mitochondria in an animal cell?

    <p>Cellular respiration and energy production</p> Signup and view all the answers

    The structure responsible for the synthesis of lipids in an animal cell is called:

    <p>Smooth endoplasmic reticulum</p> Signup and view all the answers

    What happens when ATP is broken down and the third phosphate is removed?

    <p>Free energy is released to power cellular functions.</p> Signup and view all the answers

    What best describes the reaction A + B → C + D?

    <p>Endergonic</p> Signup and view all the answers

    What represents the activation energy required for the enzyme-catalyzed reaction?

    <p>The energy barrier that must be overcome for the reaction to proceed</p> Signup and view all the answers

    If a DNA molecule is 10% Thymine, what percentage of Guanine would be expected?

    <p>20%</p> Signup and view all the answers

    How do the leading and lagging strands differ during DNA replication?

    <p>The leading strand is synthesized continuously, while the lagging strand is synthesized in short Okazaki fragments.</p> Signup and view all the answers

    Which organelle is responsible for storing, modifying, and packaging proteins and lipids?

    <p>Golgi apparatus</p> Signup and view all the answers

    Which organelle would you expect to be abundant in muscle cells due to its role in energy release?

    <p>mitochondrion</p> Signup and view all the answers

    Which type of cell junctions seals tissues to prevent fluid leakage?

    <p>tight junctions</p> Signup and view all the answers

    Which organelles are believed to have evolved from free-living prokaryotes?

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

    What type of molecules can easily pass through a cell membrane?

    <p>small and hydrophobic</p> Signup and view all the answers

    Initially comparing the concentrations of the original solutions, side A is what in relation to side B?

    <p>hypertonic</p> Signup and view all the answers

    What occurs as the molecules move and the system reaches equilibrium?

    <p>The sucrose particles move so that the concentration of sucrose is equal on both sides.</p> Signup and view all the answers

    Which diagram represents an animal cell placed in a hypotonic solution?

    <p>Cell A</p> Signup and view all the answers

    What is expected to happen to a plant cell placed in a hypotonic solution?

    <p>The cell will become turgid but not burst.</p> Signup and view all the answers

    What is the relationship between the concentrations of sucrose and glucose in the U-tube?

    <p>Side A has a higher total solute concentration than side B.</p> Signup and view all the answers

    Which scientist is known for studying bacteriophages to demonstrate that DNA is the genetic material?

    <p>Alfred Hershey and Martha Chase</p> Signup and view all the answers

    Which of the following works involve studying bacteria associated with pneumonia and observing transformation?

    <p>Frederick Griffith</p> Signup and view all the answers

    What is the primary contribution of Watson and Crick to science?

    <p>Proposed the model of DNA's double helix</p> Signup and view all the answers

    What achievements are associated with Rosalind Franklin in the study of DNA?

    <p>Used X-ray crystallography to analyze DNA</p> Signup and view all the answers

    What is the main reason viruses are classified as non-living entities?

    <p>They require a host to reproduce</p> Signup and view all the answers

    Study Notes

    Water Properties

    • Water is a universal solvent, dissolving most polar and ionic substances.
    • Water sinks as it freezes, maximizing space and minimizing density.
    • Water has a high surface tension, allowing insects to walk on water.

    Organic Molecules

    • Molecules that contain nitrogen besides carbon, oxygen, and hydrogen are steroids, such as testosterone.

    Homeostasis

    • Maintaining constant internal conditions is called homeostasis.
    • Homeostasis occurs, for example, through evaporative cooling.

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    Description

    Test your knowledge on essential biological concepts covered in Chapter 6. This quiz explores properties of water, DNA structure, genetic coding, and the classification of viruses. Perfect for students seeking to reinforce their understanding of these fundamental topics.

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