DNA/RNA Chapter 12 Biology
How many bases are needed to specify three amino acids? -3 -6 -9 -12
9
What did Hershey and Chase know about bacteriophages that led them to use these viruses in their DNA experiments? -Bacteriophages are made up of a protein coat surrounding DNA. -Sulfur in all bacteriophages is radioactive. -Protein from bacteriophages enters bacteria. -Bacteriophages have no DNA of their own
Bacteriophages are made up of a protein coat surrounding DNA.
What would Hershey and Chase have concluded if both radioactive 32p and 35s were found in the bacteria after their experiment? -The viruses protein coat was not injected into the bacteria -The viruses DNA was not injected into the bacteria -Genes are made of Protein -Both virus's protein coat and its DNA were injected into the bacteria.
Both virus's protein coat and its DNA were injected into the bacteria.
During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases -TCGAAC. -GATCCA -AGCTTG. -GAUCCA.
GATCCA
What happens during the process of translation? -Messenger RNA is made from DNA. -The cell uses information from messenger RNA to produce proteins. -Transfer RNA is made from messenger RNA. -Copies of DNA molecules are made.
The cell uses information from messenger RNA to produce proteins.
Genes contain instructions for assembling -purines. -nucleosomes. -proteins. -pyrimidines.
proteins
Because of the base pairing in DNA, the percentage of... -adenine molecules in DNA is about equal to percentage of guanine molecules -pyrimidines in DNA is about equal to the percentage of purines -purines in DNA is much greater than the percentage of pyrimidines. -cytosine molecules in DNA is much greater than the percentage of guanine molecules.
pyrimidines in DNA is about equal to the percentage of purines
RNA contains the sugar... -ribose -deoxyribose -glucose -lactose
ribose
During replication, the function of the enzyme DNA polymerase is to a... -bind nucleotides together -send messages. -receive messages. -locate replication sites.
bind nucleotides together
Which of the following include all the others? -DNA molecules -histones -chromosomes -nucleosomes
chromosomes
Which of the following is a nucleotide found in DNA? -ribose + phosphate group + thymine -Ribose + phosphate group +uracil -deoxyribose + phosphate group + uracil -deoxyribose + phosphate group + cytosine
deoxyribose + phosphate group + cytosine
Which of the following is a nucleotide found in DNA? -ribose + phosphate group + thymine -ribose + phosphate group + uracil -deoxyribose + phosphate group + uracil -deoxyribose + phosphate group + cytosine
deoxyribose + phosphate group + cytosine
Where is messenger RNA "edited" into its final form? -in the cytoplasm -in the ribosomes -in the nucleus -in the anticodon
in the nucleus
During transcription, an RNA molecule is formed -that is complementary to both strands of DNA. -that is identical to part of a single strand of DNA. -that is double-stranded. -inside the nucleus.
inside the nucleus.
Which type of RNA functions as a blueprint of the genetic code? -rRNA -tRNA -mRNA -RNA polymerase
mRNA
How many main types of RNA are there? -1 -3 -hundreds -thousands
3
Avery's experiments showed that bacteria are transformed by... -RNA -DNA -Proteins -Carbohydrates
DNA
Which of the following statements is TRUE? -A promoter is part of an intron. -A pre-mRNA molecule is longer than the gene from which the molecule was transcribed. -Introns are sequences of DNA. -Any mRNA molecules made from the same gene are always edited the same way.
Introns are sequences of DNA.
DNA replication results in two DNA molecules, -each with two new strands. -one with two new strands and the other with two original strands. -each with one new strand and one original strand -each with two original strands.
each with one new strand and one original strand
Which type(s) of RNA is(are) involved in protein synthesis? -transfer RNA only -messenger RNA only -ribosomal RNA and transfer RNA only -messenger RNA, ribosomal RNA, and transfer RNA
messenger RNA, ribosomal RNA, and transfer RNA
