27. C. When ribosome encounter a stop signal translation stops.
28. D. The numerical notation for the correct reading frame is +1.
29.B . Chaperones are responsible for the correct folding of nascent proteins.
30.B. the primary structure of proteins tells about the sequence of amino acids in protein.
lation stops when the ribosome A) Runs into a repressor protein B) Becomes stuck on an...
21. Double helix22. Repressor protein23. Adenine24. Ribosome.25. Promoter26. Replication27. RNA Polymerase.28. CodonA. Enzyme that synthesizes RNAB. Organelle where proteins are assembledC. Complementary to either Thymine or UracilD. mRNA sequence that codes for one amino acidE. Shape of double stranded DNAF. Sequence of DNA that controls gene expressionG. binds an operator and stops gene expression in LAC operon by preventing RNA polymerase from binding gene and transcribing. H. Duplication of DNA in 5 phase of Interphase
Which is the factor(s) involved in the regulation of gene activity? Select one: a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. b. SAM binding to a riboswitch mRNA. c. Alterations in mRNA conformations by SAM during the transcription. d. All of these. e. None of these.
Question 51 (1 point) The lactose repressor protein a) is activated by binding lactose b) is inactivated by binding lactose C) is transcribed with the structural lac genes d) requires lactose for its transcription e) None of the choices are correct.
22. Steroids bind receptors that are a. Located in the cytoplasm b. G protein-coupled c. Integral membrane proteins d. Peripheral membrane proteins 23. Which of the following is the sequence of events in cortisol signaling? a. Gene expression, release of the inhibitor from the receptor, binding of ligand, exposure of DNA binding site, change in conformation of receptor b. Binding of ligand, exposure of DNA binding site, change in conformation of receptor, release of inhibitor from receptor, gene expression c....
1) Select all that apply. Globular proteins: a)are found in hair and wool. b)include myoglobin and collagen. c)are usually water soluble. d)aggregate in aqueous media. e)are often made of β-pleated sheet and α-helix sections wrapped into compact structures. 2) Select all that apply. The Bohr effect: a)depends on the atomic orbital structure of hydrogen. b)can be summarized as a reduction in the oxygen affinity of hemoglobin with decreasing pH. c)is explained by the protonation of key amino acids, including the...
In Bacteria, translation of nascent RNA transcripts is often initiated before transcription is terminated. When this occurs: Select one: a. RNA is transcribed 3'=>5' and amino acids are added to the carboxy terminus of the growing polypeptide as the ribosome moves 5' => 3' along the mRNA b. RNA is transcribed 5'->3' and amino acids are added to the amino terminus of the growing polypeptide as the ribosome moves 3'=> 5' along the mRNA c. RNA is transcribed 3'=> 5'...
9. Alpha-helices and B-pleated sheets are both examples of a. primary structure. b. secondary structure. c. tertiary structure. d. quaternary structure. 14. The most common moti uispersion forces nost common motifs for this level of structure are the helix and the B- pleated sheet a. primary structure b. secondary structure c. tertiary structure d. quaternary structure e. both secondary and tertiary of a protein. 15. The amino acid sequence is the a. primary structure b. secondary structure c. tertiary structure...
#59) During protein synthesis, what happens to the ribosome? A) attach to the mRNA molecule and travel along its length B) attach to the DNA molecule and travel along its length to produce an mRNA molecule C) Translate mRNA into tRNA D) Transcribe mRNA to tRNA E) Translate mRNA into DNA #60) if you digested the human genome (3 billion bp) with a 7-cutter restriction enzyme, approximately how many fragments would you get? A) 511461 B)183105 C)16384 D)88 E) None...
21. Which of the following would NOT change the structure and function of a protein A Methylation of a protein B. Lipid modification of a protein C Change in the length of the Poly A tail of the mRNA transcript encoding a protein D. Change in the position of reactive amino acids E. Proteolysis 22. Two peptides have almost the exact same primary structure, except that one has about 10 fewer amino acids at the amino-terminus (N-terminus) of the protein....