Who discovered that a DNA molecule has about the same amount of adenine as thymine and of cytosine as guanine
Who is Erwin Chargaff
100
True or false... Each strand of DNA double helix has ALL the information needed to construct the other half by the mechanism of base pairing
What is true
100
what are the 2 kinds of mutations?
What is point mutations and frameshift mutations
100
What is the full name of DNA?
What is deoxyribonucleic acid
200
True or false... Adenine and guanine are called purine basses, which has 2 rings of atoms
What is TRUE!!!
200
What was Chargaff's rule?
What is C=G and T=A
200
What are the steps in DNA replication
What is 1) DNA helicase breaks the bonds between the nitrogenous bases
2) DNA polymerase attaches new bases
3) DNA polymerase can only work from the new strand's 5' end to its 3' end
4) The Okazaki fragments are linked together by the DNA ligase
200
what is the significance of mutations
What is little to no effect on gene expression, but some mutations are the cause of genetic disorders
200
What are genes?
What are coded DNA instructions that control the production of proteins
300
True or false... Cytosine and thymine are the pyrimdine bases, which are arranged in double rings
What is FALSE! they are arranged in single rings
300
What did Rosalind Franklin discover and how?
What is she found that DNA was a double helix (twisted ladder shape) and found this out by shooting x rays at a DNA molecule
300
True or false... Parents strands separate and serve as templates for new strands of RNA
What is FALSE... DNA
300
What is a polyploidy
the condition in which an organism has extra sets of chromosomes
300
What is the difference between mRNA, tRNA and rRNA?
What is mRNA- carries copies of instructions for assembling amino acids into proteins
tRNA- transfers each amino acid to the ribosome
rRNA- ribosome are made up of proteins and rRNA
400
Nucleic acids are composed of what nucleotides?
What is a phosphate group, a 5-carbon sugar and a nitrogenous base
400
What did Watson and Crick discover?
What is the fact that DNA was a double helix
400
True or false... The Okazaki fragments re linked together by the enzyme DNA helicase
What is FALSE!!! DNA LIGASE!!
400
what is point mutations?
What are mutations involving a change in one or a few nucleotides
400
what is transcription?
What is RNA molecules are produced by coping part of a nucleotide sequence of DNA into a complementary sequence in RNA
500
Which bases go together?
What is Adenine-Thymine and Cytosine- Guanine
500
What are 2 important characteristics that Watson and Crick discovered about DNA?
What is the fact that the opposite sides of the helix are anit-parallel and that rungs of this twisted ladder are the nitrogenous bases
500
True or false.. the scientists Meselson and Stahl discovered semi- conservative replication
What is TRUE!
500
What is a frameshift mutation?
What is and addition or deletion of a nucleotide causes a shift in the grouping of codons
500
true or false... Transcription requires the enzyme RNA polymerase