Lac operon - Study guides, Class notes & Summaries
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Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide Questions With Answers.
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Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide Questions With Answers. Explain the concepts of penetrance and expressivity 
Penetrance is the percentage of cases in which a certain phenotype is expressed. There 
are two types: 
i. Complete Penetrance: when 100% is correlated to the genotype. So, all express 
the same thing. 
ii. Incomplete: this is when some are identical, and others are different. 
Penetrance= # with genotype showing phenotype x 100 
# wit...
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Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide 2024/2025
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Biology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide 2024/2025. Review discussion about Breast Cancer 
Breast Cancer (BRCA1 and BRCA2) 
c. Provides instructions for making a protein that acts as a tumor suppressor 
d. Prevents cells from growing and dividing 
e. Accounts for 30-40% of families with breast cancer cases 
Penetrance and BRCA 
a. Refers to the risk of developing breast and ovarian cancer 
b. A reliable estimate of penetrance is crucial for medical co...
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BIOL 3025 STUDY GUIDE TEST.
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BIOL 3025 STUDY GUIDE TEST. 
 
 
The lac operon is expressed when 
A) glucose is high and lactose is absent. 
B) glucose is low and lactose is absent. 
C) glucose is low, regardless of the presence or absence of lactose. 
D) glucose is high and lactose is present. 
E) glucose is low and lactose is present. - CORRECT ANSWER E 
 
When in a complex with ________, the CAP protein binds to the CAP site and ________ the expression of the lac operon. 
A) glucose ; switches on 
B) lactose ; switches on ...
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MICR 3033 Exam #4 Questions with complete solutions
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All cells that make up an organism contain the exact same DNA sequence (genome) however individual cell-types look and function very differently. Why? Correct Answer-each cell-type expresses a unique set of genes of the genomic DNA. 
 
Speaking of genotype and phenotype how are these terms defined? Correct Answer-the genotype defines the genetic information (gene) and the phenotype the outcome of gene expression. 
 
Which of the following describes a functional gene? Correct Answer-a gene is def...
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Final Exam iClicker Questions Biochem 2024/2025 with 100% correct answers
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Chp 21: What is the region immediately adjacent to the 
starting site for RNA polymerization called? 
A) promoter 
B) enhancer 
C) initiator 
D) consensus sequence 
E) TF binding site 
A) promoter 
 
 
 
Chp 21: Which of the eukaryotic transcription factors is 
responsible for binding the TATA box? 
A) TFIIB 
B) TFIID 
C) TFIIE 
D) TFIIF 
E) TFIIH 
B) TFIID 
 
 
 
 
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iology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide
- Exam (elaborations) • 14 pages • 2024
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iology 1000 – Principles of Biology ( BioS 115 Core II: Genetics) Exam Study Guide. Explain the concepts of penetrance and expressivity 
Penetrance is the percentage of cases in which a certain phenotype is expressed. There 
are two types: 
i. Complete Penetrance: when 100% is correlated to the genotype. So, all express 
the same thing. 
ii. Incomplete: this is when some are identical, and others are different. 
Penetrance= # with genotype showing phenotype x 100 
# with the genotype 
Expressi...
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Exam 1 LMR questions and answers
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Exam 1 LMR questions and answers 
 
 
 
 
Draw out medically important bacteria 
 
 
 
 
Lac operon sequence 
lacl, codes for repressor, C-P-O, ZYA 
 
 
 
 
Example of a isoform 
tropomyosin, an actin filament binding protein 
 
 
 
 
3 functions of RNAi naturally in body 
proliferation, differnetiation, apoptosis 
 
 
 
 
What is miRNA 
double stranded RNA with guide sequence, binds to mRNA and RISC to form RISC complex to degrade mRNA for gene regulation 
 
 
 
 
What is RISC 
RNA induced sil...
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LS23L|91 Final Quiz Questions Correctly Answered|19 Pages
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_______________ is the rapid spread of disease to a large population over a short period of time, and ______________ is when _____________ strikes at a global scale. 
 
Select one: 
a. Epidemic, pandemic, epidemic 
b. Outbreak, epidemic, pandemic 
c. Epidemiology, pandemic, epidemic 
d. Outbreak, epidemiology, pandemic 
e. Pandemic, epidemic, pandemic - ️️a 
A certain disorder completely prevents the production of the Lac repressor for the Lac operon. Which of the following would result if a...
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Honors Biology Final Exam 2024 with Verified Solutions
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Honors Biology Final Exam 2024 with 
 
Verified Solutions 
 
What is the role of microtubules in cell division? 
 
 Microtubules form the mitotic spindle, which helps separate chromosomes into daughter 
cells during cell division. 
 
How does the concept of endosymbiosis explain the origin of mitochondria and chloroplasts? 
 Endosymbiosis suggests that mitochondria and chloroplasts originated from free-living 
prokaryotes that were engulfed by a host cell, establishing a mutualistic relationship...
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Genetic, Evolution, & Ecosystems OCR 47 Review Summary Questions 2024
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19.1 Discuss why beneficial mutations are rare & suggest a process that beneficial mutations underpin (4 MARKS) - ️️Majority of mutations are silent (1); idea that random change to protein structure is more likely to reduce function (1); idea that beneficial mutations increase chances of survival if environment changes (1); surviving organisms reproduce and pass new alleles to offspring (1); leading to evolution (1) 
19.1 Outline why majority of mutations do not have an influence phenotype (...
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