Lac-operon Studienführer, Klassennotizen & Zusammenfassungen
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Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers,100% CORRECT
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Biochemistry Exam 3 Practice Tests 225 Questions with Verified Answers 
 
The complementary strand for the sequence 5' GCACTTCG 3' is - CORRECT ANSWER 5' CGAAGTGC 3' 
 
Polysomes...? 
 
(a) contain multiple mRNA's 
(b) contain multiple DNA's 
(c) contain multiple ribosomes 
(d) contain multiple RNA polymerases 
(e) a and c - CORRECT ANSWER (c) contain multiple ribosomes 
 
"Multiple ribosomes initiate on a SINGLE mRNA Polyribosomes or polysomes"- Ch 7 
 
Proliferating cell nuclear ...
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BIOC 385 exam 4 (100% Correct Answers)
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An experiment with bacteria that has been exposed to an antibiotic reveals that the translocation step has been inhibited. Which antibiotic was likely used? correct answers none of these answers are correct. 
 
The correct mRNA secondary structure of transcriptional termination is __________ stem-loop structure. correct answers 3-4 
 
In negative autoregulation, correct answers proteins repress their own gene expression. 
 
Which sequence is MOST likely to be prenylated in the ER? (The ... repre...
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Edexcel a level biology question paper 2 june 2023 salters Nuffield + mark scheme
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Please check the examination details below before entering your candidate information 
Candidate surname Other names 
Centre Number Candidate Number 
Pearson Edexcel Level 3 GCE 
Friday 16 June 2023 
Morning (Time: 2 hours) Paper reference 9BN0/02 
Total Marks 
Biology A (Salters Nuffield) 
Advanced 
PAPER 2: Energy, Exercise and Coordination 
You must have: 
Scientific calculator, pencil, ruler 
Instructions 
• Use black ink or ball-point pen. 
• Fill in the boxes at the top of this page wi...
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TAMU bio 111 lab exam 2 review (2023/2024) already passed Geaded A+
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TAMU bio 111 lab exam 2 review (2023/2024) already passed What is the difference between the coding and non-coding region? Coding region: comprised of genes that encode proteins (instructions that determine traits) and makes up 1-2% of human DNA. • Noncoding region: makes up 98-99% of human DNA, contains STRs and is responsible for regulatory functions such as gene transcription. What are STRs? Short-tandem repeats (STRs) are unique repeating patterns of the same nucleotide sequence. They can ...
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Biology 2100 Final Exam Study Guide 2022 with complete solution
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Biology 2100 Final Exam Study Guide 2022 with complete solution 
 
operon 
a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway 
genes of an operon 
arranged sequentially after the promoter 
promoter 
a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place 
regulatory gene 
codes for a protein, such as a repressor, that controls the ...
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Bio Practice Exam 28 Questions with Verified Answers,100% CORRECT
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Bio Practice Exam 28 Questions with Verified Answers 
 
Why did DNA evolve to be the carrier of genetic information in cells as opposed to RNA? - CORRECT ANSWER the hydrogen at the 2' position in the deoxyribose of DNA makes it more stable than RNA 
 
In the mismatch repair process, enzyme complexes replace bases that were incorrectly inserted into the newly synthesized DNA strand. To function, they must be able to distinguish between the parent DNA strand and the new strand. How is this accomp...
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BIO Exam 4 Practice Test 174 Questions with Verified Answers,100% CORRECT
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BIO Exam 4 Practice Test 174 Questions with Verified Answers 
 
The term polycistronic mRNA means: 
A.There is more than one mRNA strand produced during each round of transcription. 
B.There are multiple promotors to initiate transcription of this RNA. 
C.There are multiple operators for transcription of this RNA. 
D. There are multiple open reading frames in the mRNA produced. - CORRECT ANSWER D 
 
Please choose the true statement: 
A. During replication, the DNA leading strand is polymerized i...
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Biology 2100 Final Exam Study Guide 2022 with complete solution
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Biology 2100 Final Exam Study Guide 2022 with complete solution 
 
operon 
a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway 
genes of an operon 
arranged sequentially after the promoter 
promoter 
a specific nucleotide sequence in DNA that binds RNA polymerase, positioning it to start transcribing RNA at the appropriate place 
regulatory gene 
codes for a protein, such as a repressor, that controls the ...
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BIO 2100 EXAM 6 (with solutions)
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Describe how replica plating can be used to identify certain lac operon mutants correct answer 
 
Explain what a "constitutive" mutant is correct answer lost normal regulation, expressing genes for utilizing lactose even when not present/needed 
-detected by cleavege of B-galactosidase (ONPG) nitrogen group turned yellow 
-mutant organism that continuously produces a protein (may be produced in excess) due to mutation in regulatory gene, always expressed or impossible to turn off 
 
Explain ...
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Biology Chapter 18 Practice Test 44 Questions with Verified Answers,100% CORRECT
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Biology Chapter 18 Practice Test 44 Questions with Verified Answers 
 
In the case of E. coli, the bacterium may need to synthesize tryptophan, or its host, a human, may supply all the tryptophan it needs. Why do both bacteria and humans need tryptophan? 
A) It is an important enzyme in the glycolysis pathway. 
B) It is one of the 20 amino acids used by all organisms to synthesize proteins. 
C) It is an important constituent of cell walls in both humans and bacteria. 
D) Tryptophan induces the ...
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