The mRNA joins to the small subunit of the ribosome. The first codon is AUG, which codes for arginine. Once the tRNA joins, the large subunit joins the initiation complex and transcription elongation begins.
a) True
b) False
69. Peptide bonds are made between amino acids in the P and A site. Once this occurs, the tRNA in the P site translocates to the e site and exits.
a) True
b) False
70. Missense mutations change the amino acids in the protein whereas a nonsense mutation occurs when a stop codon is added in
a) True
b) False
71. When lactose is present, it binds to the repressor protein which in turn results in the ability to transcribe the Lac Operon genes.
a) True
b) False
72. The Trp operon is constitutively active. The presence of tryptophan activates the repressor protein so that it could bind to the operator. This is called a repressible operon.
a) True
b) False
73. Histone Acetyl Transferases (HATS) make histone proteins more neutral, which causes DNA to loosen, resulting in DNA decondensation
a) True
b) False
74. A nucleosome is DNA and its associated histone protein complex. Nucleosomes are linked together through linker DNA.
a) True
b) False
75. Enhancer regions of DNA help to bind activators which bind mediators (or coactivators) which bind to transcription factors and DNA Polymerase. Once DNA polymerase is bound, then transcription can begin.
a) True
b) False