Biology, 10.03.2020 00:46 kennedy6010
Computer programmers, working with molecular geneticists, have developed computer programs that can identify genes within long stretches of DNA sequences. Imagine that you are working with a computer programmer on such a project. On the basis of what you know about the process of transcription, what sequences should be used to identify the beginning and end of a prokaryotic gene with the use of this computer program? Select all that apply.
(A) Sequences with close similarity to the -35 and -10 sequences upstream of start site.
(B) A stop codon indicates the last transcribed nucleotide.
(C) The start codon (AUG) indicates the first transcribed base.
(D) Sequences with close similarity to the -25 TATA box are found near the beginning of a gene.
(E) Short, inverted repeats followed by at least seven T nucleotides indicating potential intrinsic termination sites.
(F) At least five inverted repeats indicate the last transcribed nucleotide that indicates intrinsic termination site.
(G) Sequences with 10 to 20 repeats of A and T nucleotides mark the beginning of most genes.
Answers: 3
Biology, 21.06.2019 23:00
Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression.c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression.d-neelaredoxin is only produced when there is exposure to o2 or h2o2.
Answers: 3
Biology, 22.06.2019 07:30
The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction
Answers: 1
Biology, 22.06.2019 10:00
Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
Answers: 2
Computer programmers, working with molecular geneticists, have developed computer programs that can...
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