MCB 3020 UF Exam 2 Questions and Answers 100% Correct
Components of the replisome are: - ANSWER - topoisomerase, single strand binding proteins, DNA polymerase III, helicase
Anaerobic respiration - ANSWER - Uses electron carriers other than oxygen and yields less energy than aerobic respiration
Post-transcriptional modifications such as adding a G cap and a poly-A tail to the newly synthesized mRNA can be observed in - ANSWER - eukaryotes
What does the replisome not include? - ANSWER - Primers
What is true regarding rhodopsin-base phototrophy and a chlorophyll-base phototrophy? - ANSWER - Rhodopsin-base phototrophy does not involve the electron transport chain.
Chlorophyll vs bacteriorhodopsin - ANSWER - Chlorophyll is found in plants, algae, and cyanobacteria. Electrons enter the electron transport chain.
Bacteriarhodopsin is found in bacteria and archaea and acts as a proton pump. Uses proton motive force, NOT ETC
True or false: In translation 16S, rRNA acts as ribozyme during the elongation step - ANSWER - False
What does 23S rRNA do? - ANSWER - Catalyze the formation of peptide bond between the two amino acids
Transcription of operons in procaryotes produces monocistronic mRNA or polycistronic mRNA? - ANSWER - polycistronic. Eukaryotes produce monocistronic RNA polymerase recognizes the promoter region located on: - ANSWER - the DNA molecule
Chaperones - ANSWER - dramatically increase in concentration when proteins are exposed to high heat and adverse conditions to protect and refold proteins if necessary.
What are some final electron acceptors in anaerobic respiration? - ANSWER - SO4, NO3, CO2
tRNA charging is - ANSWER - completed by aminoacyl-tRNA synthetases
What is the role of DNAj and DNAj in protein secretion? - ANSWER - To assist in folding the protein
What can cause the termination of RNA synthesis? - ANSWER - Stem loop structure in the RNA molecule
Where does incoming amino acyl- tRNA bind to? - ANSWER - the A site
NO3 ----> N2 - ANSWER - Denitrification
What are true regarding protein folding? - ANSWER - Molecular chaperones are produced in large quantities in response to thermal damage; DNAj and DNAk are examples of heat-shock proteins which help in protein folding
What is a nucleosome? - ANSWER - The combination of DNA and proteins
Bacterial DNA is organized with help of ______ - ANSWER - chromatin-like protein
Are archaeal DNA and eukaryotic DNA similar? - ANSWER - YEP
What are consensus sequences in DNA transcription? - ANSWER - Prinbow box, TATA box, -35 site
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