Cell Bio Exam 2 Questions

In E. coli, what is the name of the enzyme that transcribed protien-coding DNA into RNA?
A) RNA polymerase
B) RNA polymerase II
C) RNA polymerase III
D) DNA polymerase II
E) DNA polymerase I
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In E. coli, what is the name of the enzyme that transcribed protien-coding DNA into RNA?
A) RNA polymerase
B) RNA polymerase II
C) RNA polymerase III
D) DNA polymerase II
E) DNA polymerase I
A) RNA polymerase

This is because RNA polymerase is used in prokaryotes and RNA polymerase II is used in eukaryotes
If the codon for Phe is 5'-UUC-3' what is the anti-codon that would be found on the tRNA that carries Phe?
A) 5'-UUC-3'
B) 5'-AAG-3'
C) 3'-UUC-5'
D) 3'-AAG-5'
E) 3'-TTC-5'
D) 3'-AAG-5'
Where is the cell cortex located in animal cells?
A) In the cytoplasm just underneath the plasma membrane
B) In the nucleus just underneath the nuclear envelope
C) Outside the cell right above the plasma membrane
D) In the cytoplasm, right outside of the nuclear envelope
E) Animal cells don't have a cell cortex
A) In the cytoplasm just underneath the plasma membrane
Which of the following statements about ribosomes is FALSE?
A) Ribosomes in prokaryotes are identical to ribosomes in eukaryotes
B) Ribosomes are made of RNA and protein
C) Ribosomes are found in the cytoplasm of all cells
D) Ribosomes have a large and small subunit
E) Ribosomes are important for protein translation
A) Ribosomes in prokaryotes are identical to ribosomes in eukaryotes
Which of the following organisms will have a plasma membrane?
A) all prokaryotes and eukaryotes
B) all eukaryotes
C) all archaea
D) bacteria and fungi only
E) all plants and prokaryotes
A) all prokaryotes and eukaryotes
You find 16S rRNA in......
A) the large ribosomal subunit in bacteria
B) the small ribosomal subunit in prokaryotes & eukaryotes
C) the large ribosomal subunit in eukaryotes
D) the small ribosomal subunit in bacteria
E) the small ribosomal subunit in eukaryotes
D) the small ribosomal subunit in bacteria
Which of the following statements about tRNA is FALSE?
A) an amino acid is covalently bonded to the 3' end of the tRNA
B) they contain an intervening sequence that is removed after transcription
C) they are made by RNA Polymerase III in eukaryotes
D) they have an anti-codon loop that binds to the complimentary sequence on the mRNA
E) they are transcribed in the nucleolus in eukaryotes
E) they are transcribed in the nucleolus in eukaryotes
What is the most common subunit found in biological cell membranes?
A) Glycolipids
B) steroids
C) polysaccharides
D) amino acids
E) phospholipids
E) phospholipids
What codon(s) interact with the release factor to terminated protein translation?
A) AUG
B) UAA, UAG, UGA
C) TAA, TAG, TGA
D) AUU, AUC, ACU
E) CAU, UAU, GAU
F) AAA, UUU, CCC
B) UAA, UAG, UGA

These are the STOP codons
During the elongation stage of protein translation, where does a charged tRNA first bind in the ribosome? [NOT the first tRNA that binds during initiation]
A) The T site
B) The A site
C) The P site
D) The E site
E) Its different for bacteria and eukaryotes
B) The A site
A molecule that moves by simple diffusion will travel from an area of ________ concentration to an area of _______ concentration.High, lowWhich of the following molecules can easily pass through a membrane by itself? A) amino acids B) Cl- C) glucose D) Na+ E) O2E) O2What structure is on the outside of cells and creates a protective region around the cell A) glycoproteins B) cell cortex C) spectrin dimers D) glycocalyx E) lipid raftsD) glycocalyxWhat is an aquaporin? A) A channel protein found in the plasma membrane of aquatic organisms B) A carrier protein for water transport C) A specialized opening in the nuclear membrane D) A channel protein for water transport E) a specialized form of lipid found in the glycocalyxD) A channel protein for water transportWhat type of amino acids would you expect to find on the interior of the bacteriorhodopsin protein, where H+ are traveling? A) you can't tell, you need more information B) polar C) non polarB) polarThe GLUT 1 Transporter is an example of a A) active transporter B) Coupled transporter C) antiport D) symport E) uniportE) uniportIf you dropped red blood cells into a beaker of salt water from the ocean, what would you predict would happen to the cells? note: ocean water has a higher NaCl concentration than blood. A) they would shrivel up as water leaves the cells into the salt water B) they would shrivel up as sodium enters the cells from the salt water C) they would swell up from water movement into the cells from the salt water D) they would swell up as sodium leaves the cells into the salt water E) they would not changeA) they would shrivel up as water leaves the cells into the salt waterWhat is the difference between channel proteins and carrier proteins in the plasma membrane? A) channel proteins are allosteric, carrier proteins are not allosteric B) Both are membrane proteins but channel proteins are always open to both sides of a membrane. Carrier proteins open to one side, then flip to open to the other side. C) channel proteins are transmembrane proteins, carrier proteins are peripheral membrane proteins D) channel proteins are found in plant cells, carrier proteins are found in plant and animal cells E) channel proteins use ATP, carrier proteins do not use ATPB) Both are membrane proteins but channel proteins are always open to both sides of a membrane. Carrier proteins open to one side, then flip to open to the other side.What is the correct net result of one cycle of the Na+ K+ pump from reset to active to reset? A) 3 Na+ pumped out, 1 ATP split, 2 K+ pumped in B) 2 Na+ pumped in, 1 ATP split, 3 K+ pumped out C) 3 Na+ pumped out, 2 ATP split, 3 K+ pumped in D) 3 Na+ pumped out, 2 ATP split, 2 K+ pumped in E) 1 Na+ pumped out, 1 ATP split, 1 K+ pumped inA) 3 Na+ pumped out, 1 ATP split, 2 K+ pumped in