Review for Molecules and Cells Exam #1 (1).docx

a. 5’ UUCAAT 3’ b. 3’ UUCAAU 5’ c. 3’ AAGUUA 5’ d. 5’ AAGUUA 3’ e. none of the above 16. Which of the following peptides could hypothetically translated based on this sequence? a. Lys-Leu-Val c. Tyr-Leu-Arg-Glu-Met-Ile e. Met-Ile g. more than one of the above b. Phe-Asn-His-Thr-Ser d. Met-Glu-Ala-Leu-Tyr f. Asp-Asn-Ser h. none of above 17. Which would be a product of this mRNA? a. Met-Tyr c. Pro-His b. Gly-Val … (more a.a.) d. Met-Pro-His e. none of the above 18. What is the anticodon for methionine (Met)? a. 5’ TAC 3’ b. 5’ CAT 3’ c. 3’ GUA 5’ d. 5’ AUG 3’ e. none of the above 19. Is this molecule amphipathic? Is it saturated or unsaturated? 20. Which amino acid is the special one that has no R group? (Check all that apply) a. Cysteine b. Methionine c. Glycine d. Proline 21. Which component of a phospholipid is found in the interior of a lipid bilayer? a. Glycerol b. Fatty acids c. phosphate group d. Protein 22. Which one of the following is considered an integral membrane protein? a. A protein with its N-terminus in the cytoplasm and its C-terminus in the extracellular space a. A protein attached to a transmembrane protein via hydrogen bonding b. A protein attached to a phospholipid via iconic bonding with the head group of the lipid molecule c. A protein capable of diffusing throughout the cytoplasm of a cell 23. How many different types of amino-acyl tRNA synthases are there in a cell? a. 1 a. 3

a. More; lyse a. More; shrink b. Less; lyse c. Less; shrink 43. Which of these statements regarding mRNA is false: a. A shine-dalgarno sequence tells a prokaryotic ribosome where to bind a. A TATA box signals the beginning of transcription for both eukaryotes and prokaryotes b. A prokaryote can make polycistronic mRNA a eukaryote cannot c. Prokaryotic mRNA does not include uracil d. A eukaryote makes its mRNA in the nucleus, a prokaryote does not 44. How many membranes does a mitochondria have? a. 0 b. 1 c. 2 d. 3 e. 4 45. What type of bond holds a string of nucleotides together in a chain of a single stranded DNA? a. Peptide bond b. Phosphodiester bond c. nucleotide bond d. Ionic bond 46. What term is used to describe the type of mRNA that encodes multiple proteins? a. Polyaminocyl b. Polycistronic C. polypeptidic d. Polyribosomal 47. What maintains the lysosomal pH at 5? a. Aciditase b. Basitase c. Proton pump d. Hydroxyl pump 48. If the pH of a solution changes from 2.3 to 5.3, the [H+] changed by ___ ions: a. 100 b. 1000 c. 2 d. 2000 49. Which are unique to (only present in) eukaryotic transcription? (select all that apply) a. Enhancers b. Sigma c. mediator complex d. Promoter 50. What is the sequence of initiation in translation? a. Large subunit → small subunit → tRNA a. Small subunit → large subunit → tRNA b. tRNA → small subunit → large subunit c. Small subunit → tRNA → large subunit 51. Select the following that use energy: a. Facilitated a. Primary b. Simple c. Secondary