Question

In: Biology

1) The Hershey Chase experiments in 1928 identified that genetic (heredity) material was comprised of proteins....

1) The Hershey Chase experiments in 1928 identified that genetic (heredity) material was comprised of proteins. (True/False)

2) Viruses can cause disease in plants and animals and even bacteria. (True/False)

3) Hershey and Chase were scientists who conducted experiments that demonstrated that DNA is the genetic material of bacteriophages. (True/False)

4) Viruses prefer to reproduce within a host cell but can also reproduce by themselves. (True/False

5) RNA is not absolutely necessary for your cells to make amino acids which make proteins. (True/False)

6) A plasmid is usually circular piece of DNA that can carry genes from one cell to another cell. This process is used in labs to transfer genetic information into host cells to produce valuable medical products.(True/False)

7) Not all segments of RNA are used to make amino acids which then make proteins. The noncoding segments that are cut out of the RNA are called exons. (True/False)

8) The envelope of a flu virus helps the virus open and enter the cell and insert its DNA into the host cell genome. (True/False)

9) Bacteria have the ability to "swap" DNA through the method of conjugation. (True/False)

10) If human is infected with a virus then he or she will show immediate effects. (True/False)

11) Elongation is the process of adding one amino acid to another by peptide bonds during translation. (True/False)

12) Transcription uses a strand of DNA as a template or copy and makes a new strand of RNA which is used to eventually code for proteins. (True/False)

13) Genetic material of a bacteriophage enters a bacterium sort of like a drug is injected with hypodermic needle. (True/False)

14) Mutations found in DNA can have more than one cause and result in many different genetic diseases. (True/False)

15) The AIDS virus is a retrovirus. (True/False)

Solutions

Expert Solution

1.The Hershey Chase experiments in 1928 identified that genetic (heredity) material was comprised of proteins. - False

2) Viruses can cause disease in plants and animals and even bacteria - True (Bacteriophages can lyse or lysogenise their host bacterial cells)

3) Hershey and Chase were scientists who conducted experiments that demonstrated that DNA is the genetic material of bacteriophages. True

4) Viruses prefer to reproduce within a host cell but can also reproduce by themselves. False (Replication of a viruse requires the enzymatic machinery of the host).

5) RNA is not absolutely necessary for your cells to make amino acids which make proteins. True (Non essential amino acids are synthesized within the body and essential amino acids are obtained from the diet).

6) A plasmid is usually circular piece of DNA that can carry genes from one cell to another cell. This process is used in labs to transfer genetic information into host cells to produce valuable medical products.True (bacterial plasmids are used as cloning vectors when the host is a bacterium).

7) Not all segments of RNA are used to make amino acids which then make proteins. The noncoding segments that are cut out of the RNA are called exons. False (RNA is used for making proteins and not amino acids. Non coding segments in precursor mRNA are introns and not exons. Exons are the coding segments).

8) The envelope of a flu virus helps the virus open and enter the cell and insert its DNA into the host cell genome. True

9) Bacteria have the ability to "swap" DNA through the method of conjugation. True

10) If human is infected with a virus then he or she will show immediate effects. False

11) Elongation is the process of adding one amino acid to another by peptide bonds during translation. True

12) Transcription uses a strand of DNA as a template or copy and makes a new strand of RNA which is used to eventually code for proteins. True (The template strand of DNA is transcribed into an mRNA which is translated into proteins).

13) Genetic material of a bacteriophage enters a bacterium sort of like a drug is injected with hypodermic needle. True (During infection only the genome of the phage is injected into the host cell and the protein coat remains outside).

14) Mutations found in DNA can have more than one cause and result in many different genetic diseases. True

15) The AIDS virus is a retrovirus. True


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