Science 9, Unit 2

61 Questions | Total Attempts: 367

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Science 9, Unit 2 - Quiz

A unit review quiz covering reproduction.


Questions and Answers
  • 1. 
    Describe two issues that come up from assisted reproductive technologies.
  • 2. 
    It is the year 2552, and you are a biological engineer given the task of creating an organism that can colonize a newly discovered planet.  The planet has a small amount of water, strong winds, and a temperature range of -20C to 50C.  What method of reproduction would your organism use?  Why?
  • 3. 
    What is the difference between plant and animal cells?
    • A. 

      Only animal cells have cell walls and chloroplasts.

    • B. 

      They are the same.

    • C. 

      Only plant cells have cell walls and chloroplasts.

    • D. 

      Only plant cells have ribosomes not connected to the endoplasmic reticulum.

  • 4. 
    Proteins are built in the ___________________.
  • 5. 
    DNA stands for:
    • A. 

      Diphosphonucleic acid

    • B. 

      Dioxyribonucleic acid

    • C. 

      Dioxyribonucleic atom

    • D. 

      Dichromatonitrogen acid

  • 6. 
    The sides of the DNA "ladder" are made up of:
    • A. 

      Sugar and phosphate

    • B. 

      Phosphate and thymine

    • C. 

      Cytosine and guanine

    • D. 

      Sugar and nucleic acid

  • 7. 
    The "rungs" of the DNA ladder are made up of:
    • A. 

      Chromatin and genes

    • B. 

      Sugar and phosphate

    • C. 

      A pair of phosphate bases

    • D. 

      A pair of nitrogenous bases

  • 8. 
    The difference between chromatic and chromosomes is:
    • A. 

      Chromatin contains DNA and proteins. Chromosomes are the x-shaped structures that strands of chromatin form into for cell division.

    • B. 

      Chromatin is the x-shaped structures used in cell division. Chromosomes are the specific strands of chromatin used in protein production.

    • C. 

      Chromatin is the DNA found in animal cells and chromosomes are the DNA found in plant cells.

    • D. 

      Chromatin provides the cell with the information used in protein production, and chromosomes provide the cell with the information used in cell replication.

  • 9. 
    Genes are:
    • A. 

      The sections of your DNA that provide information used to control cell division.

    • B. 

      The collection of chromosomes you receive from each of your parents.

    • C. 

      Are the section of DNA used to make new ribosomes.

    • D. 

      Small sections of DNA located at specific places on a chromosome that provide the information to produce the different proteins used by your cells.

  • 10. 
    If each of your cells has the same amount of genetic information, how can cells become specialized?
    • A. 

      Only specific chromosomes are unwound into chromatin.

    • B. 

      Only specific genes are read in each cell.

    • C. 

      The chromosomes that aren't needed are made non-functional by special proteins.

  • 11. 
    Specialized proteins that speed up the chemical reactions within your cells are called ____________.
  • 12. 
    Specialized proteins that act as chemical messengers are called ___________________.
  • 13. 
    Put the steps of protein production in order.A.  The golgi body repackages the protein for transport out of the cell.B.  The nucleus receives a chemical signal to make a specific protein.C.  The vesicle attaches to the cell membrane, and releases the proteins out of the cell.D. The manufactured protein enters the endoplasmic reticulum.E.  The DNA message for a specific protein is copied into a small molecule called RNA.F. The RNA message is delivered to the ribosome, and the ribosome makes the protein.G. A vesicle forms off the end of the golgi body to carry the protein to the cell membrane.H.  RNA leaves through a nuclear pore.I.  A vesicle forms off the end of the endoplasmic reticulum and carries the protein to the golgi body.
    • A. 

      B, E, H, F, D, I, A, G, C

    • B. 

      C, B, E, F, G, I, A, D, H

    • C. 

      A, C, E, D, B, I, H, F, G, B

    • D. 

      I, E, B, F, G, H, A, C, D

  • 14. 
    What is a gene mutation?
    • A. 

      A mutation is a change in which bases pair together.

    • B. 

      A mutation is a change in the order of A,G,C, and T bases in a gene.

    • C. 

      A mutation is a change in the number of chromosomes an individual has.

    • D. 

      A mutation is a change in the way genes are organized on the chromosome.

  • 15. 
    When a mutation is beneficial to an organism, it is a ___________ mutation.
  • 16. 
    When a mutation results in the probability that the organism will not be able to reproduce or survive in their environment, it is a ______________ mutation.
  • 17. 
    A mutation which does not increase or decrease the survival rate of an organism is a ________________ mutation.
  • 18. 
    If the original sequence of a gene is:  ATC CAG TTA AGC CCGand after mutation is:  AAC CAG TTA AGC CCGWhat kind of mutation is it?Is it likely to be harmful?  (This question will have 2 answers checked)
    • A. 

      Deletion

    • B. 

      Addition

    • C. 

      Substitution

    • D. 

      Yes

    • E. 

      No

  • 19. 
    If the original sequence of a gene is:  ATC CAG TTA AGC CCG and after mutation is:  ACC AGT TAA GCC CG What kind of mutation is it? Is it likely to be harmful?  (This question will have 2 answers checked)
    • A. 

      Addition

    • B. 

      Deletion

    • C. 

      Substitution

    • D. 

      Yes

    • E. 

      No

  • 20. 
    Substances of factors that cause mutations are called:
    • A. 

      Mutagens

    • B. 

      Mutators

    • C. 

      Damaging substances

    • D. 

      Mutationers

  • 21. 
    True or False?In gene therapy, researchers replace a mutated gene with a healthy copy by using an inactive virus to carry the gene to the diseased cells.
    • A. 

      True

    • B. 

      False

  • 22. 
    The stages of the cell cycle are:
    • A. 

      Growth, DNA replication, cytokinesis

    • B. 

      Interphase, mitosis, cytokinesis

    • C. 

      Interphase, metaphase, anaphase, cytokinesis

    • D. 

      Mitosis, interphase, cytokinesis

  • 23. 
    During interpase the cell:
    • A. 

      Replicates its DNA, grows

    • B. 

      Grows, replicates its DNA

    • C. 

      Grows, replicates its DNA, and grows some more

    • D. 

      Grows, undergoes mitosis, separates

  • 24. 
    DNA can replicate by unwinding and breaking apart because:
    • A. 

      A and T pair, and C and G pair, so the two strands from the original form a template.

    • B. 

      Enzymes control which new bases are added to the two strands, making sure that they end up the same.

    • C. 

      It doesn't matter if the two new helices are different - that's where genetic variation comes from.

  • 25. 
    Chromosomes are comprised of:
    • A. 

      Two copies of a DNA molecule (called sister chromatids) joined by a centromere

    • B. 

      Two different strands of DNA (called sister chromatids) joined by a centromere.

    • C. 

      Two different strands of DNA (called chromatids) joined by a centriole.

    • D. 

      Two copies of a DNA molecule (called sister chromatids) joined by a centriole.

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