How Much Do You Know About Cell Biology?

10 Questions | Total Attempts: 1640

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How Much Do You Know About Cell Biology?

​​​​​​A Cell is the fundamental unit of life, and the analysis of cell structure and function is known as Cell biology. The study focuses on general properties shared by all cells, to the distinctive, highly complex features specific to specialized cells. Take this Comprehensive Practice Test to understand and test your knowledge about cell biology. Let's learn more. All the best!


Questions and Answers
  • 1. 
    The α helix and β sheet are found in many different proteins because they are formed by
    • A. 

      Hydrogen bonding between the amino acid side chains most commonly found in proteins

    • B. 

      Noncovalent interactions between amino acid side chains and the polypeptide backbone

    • C. 

      Ionic interactions between charged amino acid side chains

    • D. 

      Hydrogen bonding between atoms of the polypeptide backbone

    • E. 

      Hydrophobic interactions between the many nonpolar amino acids

  • 2. 
    • A. 

      Have conserved amino acid sequences

    • B. 

      Have conserved secondary structures

    • C. 

      Have similar functions

    • D. 

      Have conserved tertiary structures

    • E. 

      All of the above

  • 3. 
    Enzymes catalyze a chemical reaction by __________ the activation energy, because they provide conditions favorable for the formation of a __________ intermediate called the __________ .
    • A. 

      Lowering; high-energy; transition state

    • B. 

      Increasing; high-energy; transition state

    • C. 

      Lowering; low-energy; transition state

    • D. 

      Increasing; low-energy; alternative state

    • E. 

      Lowering; high-energy; alternative state

  • 4. 
    RNA in cells differ from DNA in that
    • A. 

      It contains the base uracil, which preferentially pairs with cytosine.

    • B. 

      It is single-stranded and cannot form base pairs.

    • C. 

      It is single stranded can can fold up into a variety of structures.

    • D. 

      The nucleotides are linked together in different way

    • E. 

      The sugar ribose contains fewer oxygen atoms than does deoxyribose

  • 5. 
    • A. 

      One codon specifies more than one amino acid

    • B. 

      The genetic code consists of 64 codons

    • C. 

      All amino acids are specified by more than one codon

    • D. 

      The genetic code is different in prokaryotes and eukaryotes

    • E. 

      All codons specify an amino acid

  • 6. 
    KM is a measure of
    • A. 

      Substrate affinity of an enzyme

    • B. 

      Enzyme performance

    • C. 

      Catalytic rate of an enzyme

    • D. 

      Ratio of [enzyme-substrate complex] to[unbound enzyme][unbound substrate]

    • E. 

      Rate of enzyme degradation

  • 7. 
    What is an example of a GTP-binding protein?
    • A. 

      Lysozyme

    • B. 

      Ef-Tu

    • C. 

      Myosin head

    • D. 

      M-phase promoting factor (MPF)

    • E. 

      Hemoglobin

  • 8. 
    What are the ways in which proteins can be regulated?
    • A. 

      Allosteric regulation

    • B. 

      Feedback regulation

    • C. 

      GTP-binding

    • D. 

      ATP-binding

    • E. 

      All of the above

  • 9. 
    Name the membrane valves that open and close for potassium efflux and sodium influx.
    • A. 

      Ion channels

    • B. 

      Vacuoles

    • C. 

      Capillaries

    • D. 

      Cytokines

  • 10. 
    What is another name for programmed cell death?
    • A. 

      Necrosis

    • B. 

      Oxidative burst

    • C. 

      Diapedesis

    • D. 

       apoptosis