Hydrophobic Effect Chapter 3, 4, & 26

90 Questions | Total Attempts: 67

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Molecule Quizzes & Trivia

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Questions and Answers
  • 1. 
    Which of these is (are) always hydrophobic?
    • A. 

      Glucose

    • B. 

      Cholesterol

    • C. 

      Amino acids

    • D. 

      Proteins

  • 2. 
    • A. 

      Sugar

    • B. 

      K+

    • C. 

      Cl

    • D. 

      Water

    • E. 

      Fat

  • 3. 
    Transmembrane proteins that make up enzymes in the plasma membrane are made up of hydrophilic and hydrophobic regions. Most amino acids embedded in the membrane are ________, while most amino acids facing the extracellular fluid are __________.
    • A. 

      Hydrophilic; hydrophilic

    • B. 

      Hydrophilic; hydrophobic

    • C. 

      Hydrophobic; hydrophobic

    • D. 

      Hydrophobic; hydrophilic

    • E. 

      Lipophilic; lipophobic

  • 4. 
    . ______ describes the number of particles of a solute in a solution, whereas ______ is the ability of a solution to affect the fluid volume in a cell.
    • A. 

      Tonicity; osmolarity

    • B. 

      Osmolarity; diffusion

    • C. 

      Osmolarity; tonicity

    • D. 

      Osmolarity; molarity

    • E. 

      Tonicity; diffusion

  • 5. 
    Water flows through a selectively permeable membrane in a process called __________, but water molecules cross the membrane more easily through channels of transmembrane proteins called __________.
    • A. 

      Osmosis; water pumps

    • B. 

      Osmosis; aquaporins

    • C. 

      Osmosis; uniport

    • D. 

      Filtration; aquaporins

    • E. 

      Filtration; water pumps

  • 6. 
    Facilitated diffusion and active transport have in common that both
    • A. 

      Are processes involving transport of a solutes up its concentration gradient.

    • B. 

      Are processes involving transport of a solutes down its concentration gradient.

    • C. 

      Are processes involving the use of energy provided by ATP

    • D. 

      Are processes ATP independent

    • E. 

      Are cases of carrier-mediated transport.

  • 7. 
    The greater the concentration gradient the faster the diffusion rate.
    • A. 

      True

    • B. 

      False

  • 8. 
    The sodium-potassium (Na+-K+) pump transports both sodium and potassium __________ their concentration gradients in a process called ____________.
    • A. 

      Up; active transport

    • B. 

      Up; facilitated transport

    • C. 

      Up; cotransport

    • D. 

      Down; active transport

    • E. 

      Down; countertransport

  • 9. 
    A red blood cell is placed in a hypertonic solution. The concentration of solutes in the solution is __________ than the concentration of solutes in the intracellular fluid and will cause the cell to ______________.
    • A. 

      Higher; swell

    • B. 

      Lower; swell

    • C. 

      Higher; shrink

    • D. 

      Lower; shrink

    • E. 

      Lower; burst

  • 10. 
    • A. 

      Diffusion of oxygen from a place of high concentration to a place of lower concentration

    • B. 

      Facilitated diffusion of K+

    • C. 

      Transport of glucose down its concentration gradient

    • D. 

      Transport of Na+ from a place of low concentration to a place of higher concentration

    • E. 

      Transport of Cl- following its concentration gradient

  • 11. 
    Which of the following processes could occur only through the plasma membrane of a living cell?
    • A. 

      Facilitated diffusion

    • B. 

      Simple diffusion

    • C. 

      Filtration

    • D. 

      Osmosis

    • E. 

      Active transport

  • 12. 
    What function would immediately cease if the ribosomes of a cell were destroyed?
    • A. 

      Exocytosis

    • B. 

      Active transport

    • C. 

      Ciliary action

    • D. 

      Protein synthesis

    • E. 

      Osmosis

  • 13. 
    Microvilli and cilia differ in their function but have the same internal structure.
    • A. 

      True

    • B. 

      False

  • 14. 
     ______ provide motility to a cell, ______ act as sensory "antenna" in many cells, and ____________ increase cell's surface area.
    • A. 

      Cilia; microvilli; flagella

    • B. 

      Microvilli; cilia; flagella

    • C. 

      Microvilli; flagella; cilia

    • D. 

      Flagella; microvilli; cilia

    • E. 

      Flagella; cilia; microvilli

  • 15. 
    Cells lining the small intestine are specialized for absorption of nutrients. Their plasma membrane has ?
    • A. 

      Flagella

    • B. 

      Cilia

    • C. 

      Microvilli

    • D. 

      Glycocalyx

    • E. 

      Dynein arms

  • 16. 
    A patient was severely dehydrated, losing a large amount of fluid. The patient was given intravenous fluids of Normal saline. Normal saline is ________ to your blood cells and is about __________ NaCl.
    • A. 

      Isotonic; 9%

    • B. 

      Isotonic; 0.9%

    • C. 

      Hypertonic; 9%

    • D. 

      Hypotonic; 0.9%

    • E. 

      Hypotonic; 9%

  • 17. 
    These are all membranous organelles except
    • A. 

      Mitochondria

    • B. 

      Ribosomes

    • C. 

      Nucleus

    • D. 

      Endoplasmic reticulum

    • E. 

      The Golgi complex.

  • 18. 
    An _______________ is composed of two or more tissues types, whereas ____________ are microscopic structures in a cell.
    • A. 

      Organ system, organs

    • B. 

      Organ system, organelle

    • C. 

      Organ, organelles

    • D. 

      Organ, molecules

    • E. 

      Organelle, molecules

  • 19. 
     ____________ gives structural support, determines the shape of a cell, and directs the movement of substances through the cell.
    • A. 

      Cholesterol

    • B. 

      The nucleus

    • C. 

      The plasma membrane

    • D. 

      The Golgi complex

    • E. 

      The cytoskeleton

  • 20. 
    Copying genetic information from DNA into RNA is called ________________________, whereas using the information contained in mRNA to make a polypeptide is called ________________________.
    • A. 

      Transcription; translation

    • B. 

      Translation; transcription

    • C. 

      DNA replication; translation

    • D. 

      DNA duplication; transcription

    • E. 

      DNA translation; RNA transcription

  • 21. 
    Transcription occurs in the _________________, but most translation occurs in the _____________.
    • A. 

      Nucleus; cytoplasm

    • B. 

      Nucleus; nucleolus

    • C. 

      Cytoplasm; nucleus

    • D. 

      Nucleolus; cytoplasm

    • E. 

      Nucleolus; rough endoplasmic reticulum

  • 22. 
    After translation, a protein may undergo structural changes called ________________ modifications.
    • A. 

      Splicing

    • B. 

      Posttranscriptional

    • C. 

      Posttranslational

    • D. 

      Polyribosomal

    • E. 

      Secretory

  • 23. 
    All of the following are directly involved in translation except
    • A. 

      DNA

    • B. 

      MRNA

    • C. 

      TRNA

    • D. 

      RRNA

    • E. 

      Ribosomes

  • 24. 
    This figure shows translation of mRNA. What does "A" show?
    • A. 

      The molecule that carries codons

    • B. 

      The molecule that carries anticodons

    • C. 

      The molecule that carries base triplets

    • D. 

      The molecule that carries amino acids

    • E. 

      The molecule that carries tRNA

  • 25. 
    This figure shows translation of mRNA. What does "E" show?
    • A. 

      A newly synthesized amino acid

    • B. 

      A newly synthesized polypeptide

    • C. 

      A newly synthesized nucleic acid

    • D. 

      MRNA

    • E. 

      TRNA