Lactose operon Studienführer, Klassennotizen & Zusammenfassungen
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BIO 111 FINAL EXAM QUESTIONS AND ANSWERS LATEST UPDATED 2024/2025 | 100% CORRECT
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What is the first mRNA processing step? - ANSWER 5' capping 
Different mRNAs are made from the same initial pre-mRNA by ________. - ANSWER 
alternative splicing 
RNA transcription begins at a ________. - ANSWER promoter 
________ protect(s) the pre-mRNA molecule. - ANSWER the 3' poly-a tail 
The process of pre-mRNA splicing removes ________. - ANSWER introns 
Spliced ________ differ in their exons. - ANSWER mRNAs 
Identify the three phases of transcription. - ANSWER initiation, elongation, 
te...
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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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BIO 13 Practice Test 40 Questions with Verified Answers,100% CORRECT
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BIO 13 Practice Test 40 Questions with Verified Answers 
 
RNA contains the sugar 
a. ribose. 
b. deoxyribose. 
c. glucose. 
d. lactose. - CORRECT ANSWER a. ribose. 
 
Unlike DNA, RNA contains 
a. adenine. 
b. uracil. 
c. phosphate groups. 
d. thymine. - CORRECT ANSWER b. uracil. 
 
Which of the following are found in both DNA and RNA? 
a. ribose, phosphate groups, and adenine 
b. deoxyribose, phosphate groups, and guanine 
c. phosphate groups, guanine, and cytosine 
d. phosphate grou...
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BIO 331 Exam 3 Questions With Correct Answers
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operon - Answer a series of genes whose expression is co-regulated by controlling their common mRNA transcript 
 
lacZ gene - Answer structural gene in lac operon which codes for beta-galactosidase, to break down beta-galactosides (which includes lactose) into glucose and galactose 
 
lacY gene - Answer structural gene in lac operon which codes for permease, which transports beta-galactosides into the cell. permeases are membrane bound 
 
lacA gene - Answer structural gene in lac operon which co...
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Week 7 PEQ Questions And Answers With Verified Study Solutions
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A eukaryotic gene is most likely to be transcribed if it is located where? 
In a region of the genome in which the histones are methylated 
In a heterochromatic region of teh genome 
In a region of the genome in which the histones are acetylated 
In a region of the genome in which the histones are unmodified - Answer-In a region of the genome in 
which the histones are acetylated 
A mutant strain of E. coli is found that produces both β-galactosidase and permease constitutively. What 
are the M...
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AP Biology Unit 6 Test with Questions Solved 100% Correct
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What enhances the expression of a gene? - the attachment of RNA polymerase to DNA 
Describe what happens when the lactose operon is turned on and transcribing. - Allolactose 
or lactose binds to and changes the shape of the repressor. 
Genes A,B,C, and D are located on the same chromosome. Testcrosses show that the 
recombination frequency between A and B is 36% and between A and C is 23%. The 
recombination frequency between C and D is 5% and between A and D is 18%. What is the 
correct sequenc...
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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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QBM Exam Questions And Answers With Complete Solutions 2024
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QBM Exam Questions And Answers With 
Complete Solutions 2024 
What are the first three steps for starting a project? - answer1 ) Choose 
2) Read literature 
3) Obtain DNA sequence 
Once you obtain the DNA sequence in the beginning of a project, BLAST will allow what? - 
answer"Basic Local Alignment Search Tool" 
- To search for homology (duplication events) 
- Can predict protein, molecular weight, pI, and extinction coefficient 
- Predict the secondary/tertiary structure, transmembrane helice...
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Bio 101 Chapter 7 Exam Questions and Answers All Correct
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Bio 101 Chapter 7 Exam Questions and Answers All Correct 
 
 
A change in a cell's DNA sequence is Select one: 
a.	transcription. 
b.	a mutation. 
c.	an operon. 
d.	translation. 
e.	replication. - Answer-b. a mutation 
 
A diploid cell only has two copies of most genes, but can make hundreds of copies of a protein from those genes per second because 
Select one: 
a.	while transcription can repeat and make multiple mRNA copies of genes, and multiple ribosomes can translate the same mRNA. 
b.	mul...
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BIOL 250 Exam 2 Questions with 100% Correct Answers
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The fundamental units of heredity are known as _____ and multiple versions of them are known as _____ . Correct Answer genes; alleles 
 
Which of the following best describes a typical prokaryote chromosome? Correct Answer circular, composed of DNA 
 
Genes with different information at the same locus are called: Correct Answer alleles 
 
What is typically the difference between the bacterial chromosome and a plasmid? Correct Answer The chromosome contains genes that are essential for survival, ...
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