Numerous Xenopus (frog) cells were exposed to varying amounts of ultraviolet light. Some of the resulting cells were observed to lack nucleoli. As a result, one would expect that the cell could not 000 replicate its DNA. export its mRNA. translate its DNA. assemble ribosomal subunits. transcribe mRNA.

Numerous Xenopus (frog) cells were exposed to varying amounts of ultraviolet light. Some of the resulting cells were observed to lack nucleoli. As a result, one would expect that the cell could not 000 replicate its DNA. export its mRNA. translate its DNA. assemble ribosomal subunits. transcribe mRNA.

Name: Numerous Xenopus (frog) cells were exposed to varying amounts of ultr
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Description: Numerous Xenopus (frog) cells were exposed to varying amounts of ultraviolet light. Some of theresulting cells were observed to lack nucleoli. As a result, one would expect that the cell could notOreplicate its DNA.export its mRNA.888translate its D

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter15: Genes And Proteins

Section: Chapter Questions

Problem 3VCQ: Figure 15.16 Many antibiotics inhibit bacterial protein synthesis. For example, tetracycline blocks...

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(b) (c) Point mutations in multiple tumor suppressor proteins have been linked to cancer. For example changes in the gene for adenomatous-polyposis-coli protein (APC gene) may result in colorectal cancer. Consider the following DNA sense strand. 3-TAC CGG TTG TGA AGC TGA ATC-5' Derive the mRNA molecule from the given DNA strand sequence above, paying attention to the polarity of the molecule. (i) (ii) (iii) (iv) Write down the polypeptide chain sequence arising from the mRNA molecule of the question above, using the table of the genetic code (Table Q1 overleaf) and indicate the C- and the N-terminus of the peptide chain. Point mutations of a cytosine (C) often lead to the dysfunction of the APC protein. Write down all possible polypeptide chains that can result from all possible DNA mutations of cytosines, disregarding a mutation in the MET/START and STOP codons. Specify which of the point mutations identified in (d) are redundant? For the given tRNA for Thrombin (Thr) write down all…
Table 8.2: Transcription and translation of the first 7 codons in the B-globin chain of hemoglobin. Normal Sequence Mutated Sequence DNA DNA amino acid DNA DNA amino Codon MRNA Codon MRNA coding template strand coding template strand strand acid code code strand sequence sequence G 1 1 G G C 2 A 2 A 3 G G A A 4 4 C G A G G G G 7 A 7 A G G Shape of RBC Shape of RBC 23 3.
At least three types of RNA are required for protein synthesis. Compare and contrast mRNA, rRNA, and tRNA by moving the descriptions of their structure and function to the appropriate categories. Some phrases may describe all three types of RNA. mRNA in eukaryotes, can exist outside the nucleus acts as an enzyme for peptide synthesis composed of ribonucleic acid rRNA Answer Bank moves amino acids to the site of protein synthesis tRNA contains nucleotide triplets that code for specific amino acids has a convoluted structure with a three-base sequence called an anticodon moves genetic information out of the nucleus and into the cytoplasm mRNA, rRNA, and tRNA
Below are the steps of protein synthesis. What is the correct sequential order? 1. MRNA is formed with codons as product of transcription. 2. Codons are translated and polypeptide chain is transferred. 3. mRNA moves into cytoplasm and becomes associated with ribosomes. 4. DNA in nucleus serves as a template. 5. Anticodon - codon complementary base pairing occurs with tRNA and MRNA. * 4, 1, 3, 2, 5 4, 3, 1, 5, 2 O 4, 1, 2, 3, 5 O 4, 1, 3, 5, 2
describe the process of reading a gene and turning it into a protein in a eukaryote.Your first paragraph should summarize transcription and your second paragraph should summarize translation. USE THE FOLLOWING 12 TERMS IN YOUR DECRIPTION: transcription, messenger RNA (mRNA), RNA polymerase, nucleus, ribosome, RNA splicing, exon, intron, translation, cytoplasm, transfer RNA (tRNA), codon.
Protein synthesis is a complicated process involving DNA being transcribed to RNA, which is then translated into amino acids. Complete the DNA-to-amino acid table for three consecutive codons with the appropriate nucleotides and amino acids using a codon table. Nucleotide and amino acid options can be used multiple times or not at all. 5' to 3' DNA strand 3' to 5' DNA strand transcribed mRNA tRNA anticodon amino acid arginine cysteine leucine T A U A T G A U arginine leucine A proline T A U Answer Bank A G G с с T T A A U glutamic acid U G C G с с glutamic acid G G G с с G C arginine C G с G
(6C) The diagram below shows the process of translation. protein moleçule forming Bead and re-read ibosome Underline 3 key words Bracket the Question Brain Dump everything you know Eliminate 2 wrong answers Select an answer Which of the following describes the role of the ribosome? Answer carries amino acids to the ribosome directs the order of monosaccharides in a protein attaches amino acids to each other to make a protein acts as a catalyst in controlling chemical reactions Previous achnologies Inc2021 Edugence edugence com/student/studentformative/# RARO
Which of these molecules has multiple partial charges and thus is most soluble in water? B H HHH HHH ABCD or E CH H CHOH D CH OH A cell is specialized in producing oil and steroid hormone. Which structure would be found in large r cell? O vacuoles O peroxisome O rough endoplasmic reticulum O smooth endoplasmic reticulum The oxygen released from photosynthesis results from: Reduction of NADP* to NADPH Chemiosmosis Oxidation of water Photophosphorylation
Hydrogen bonds are important in DNA replication and transcription. They are relatively weak chemical bonds. Why is this a desirable feature for DNA? Describe the effect (s) of changing (mutating) the promoter on the transcription of the DNA strand/gene the promoter controls. What happens to protein synthesis if a nonsense codon is inserted into the gene? Explain why a point mutation does not necessarily change the original amino acid sequence. (Explain silent mutations) Choose any pentapeptide composed of five different amino acids. List the amino acids. Present one messenger RNA codon for each amino acids and the sequence of nucleotides on the DNA that originally coded for your pentapeptide.
Eukaryotic mRNA: usessnRNPs to cut out introns and seal together translatableexons. uses a spliceosome mechanism made of DNA to recognizeconsensus sequences to cut and splice. has a guanine cap on its 39 end and a poly(A) tail on its 59 end. is composed of adenine, thymine, guanine, and cytosine. codes the guanine cap and poly(A) tail from the DNAtemplate.
Eukaryotic and prokaryotic ribosomes are similar in that: a. both contain a small subunit, but only eukaryotes contain a large subunit. b. both contain the same number of proteins. c. both use mRNA to assemble amino acids into proteins. d. both contain the same number of types of rRNA. e. both produce proteins that can pass through pores into the nucleus.
Figure 15.16 Many antibiotics inhibit bacterial protein synthesis. For example, tetracycline blocks the A site on the bacterial ribosome, and chloramphenicol blocks peptidyl transfer. What specific effect would you expect each of these antibiotics to have on protein synthesis? Tetracycline would directly affect: tRNA binding to the ribosome ribosome assembly growth of the protein chain Chloramphenicol would directly affect tRNA binding to the ribosome ribosome assembly growth of the protein chain