Bis 2a midterm Study guides, Class notes & Summaries
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![BIS 2A Midterm 1 |114 Questions And Answers| Solved Correctly](/docpics/3587574/6524105b2977c_3587574_121_171.jpeg)
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BIS 2A Midterm 1 |114 Questions And Answers| Solved Correctly
- Exam (elaborations) • 32 pages • 2023
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In addition to covalent and ionic bonds, which of the following interactions is of interest to the biologist in BIS2A. 
a. van der Waals interactions 
b. Hydrogen bonds 
c. Hydrophobic interactions 
d. a and b 
e. All of the above - ️️e. All of the above 
 
Which of the following statements about atoms is true? 
a. An electron has a more negative charge than a proton has a positive charge, which is why 
there are usually more protons than electrons in an atom. 
b. Neutrons simply add mass to...
![BIS 2A Midterm 3|136 Questions And Answers| Success Guaranteed](/docpics/3587542/65240ef18271e_3587542_121_171.jpeg)
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BIS 2A Midterm 3|136 Questions And Answers| Success Guaranteed
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Which of the following activities does the ribosome perform? 
A 
B. Polymerization of dNTPs 
C. Addition of the correct amino acid to the 3'OH of tRNA 
D. Removal of incorrect amino acids 
E. C and d are correct - ️️A. Establishment of the reading frame and formation of peptide bonds 
 
A missense mutation is: 
A. When the two bases of the double helix don't match 
B. When the sequence of a codon is changed, but its meaning is not 
C. A mutation that changes the amino acid encoded 
D....
![BIS 2A MIDTERM 2|50 Questions With Complete Solutions](/docpics/3587441/65240af349c91_3587441_121_171.jpeg)
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BIS 2A MIDTERM 2|50 Questions With Complete Solutions
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On early Earth, the first things that looked like they might be classified as living organisms used iron sulfur clusters as catalysts. If these "naked" iron sulfur clusters can catalyze reactions, why do our cells instead use proteins carrying iron sulfur clusters as catalysts? 
a. To decrease substrate specificity 
b. To increase substrate specificity 
c. To prevent spontaneous oxidation of the iron in the cluster 
d. a and c 
e. b and c - ️️e. b and c 
 
Two tabby (striped) cats are bred...
![BIS 2A Midterm 3 Britt|149 Questions And Answers| Success Guaranteed](/docpics/3587597/6524118ad731e_3587597_121_171.jpeg)
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BIS 2A Midterm 3 Britt|149 Questions And Answers| Success Guaranteed
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In cells which express telomerase, telomerase will add telomeric sequences to: - ️️The 3' ends of chromosomes 
 
A missense mutation is ... - ️️A mutation that changes the amino acid encoded 
 
Generally speaking, the genes for regulatory proteins that directly detect environmental signals (for example, the Lac Repressor protein) are transcribed... - ️️All the time (constitutively) 
 
The coding region for the lacZYA operon is fused to a strong, constitutively expressed eukaryotic p...
![BIS 2A Midterm 2|87 Questions with 100% Correct Answers | Updated | Guaranteed A+](/docpics/3587627/6524132f0be66_3587627_121_171.jpeg)
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BIS 2A Midterm 2|87 Questions with 100% Correct Answers | Updated | Guaranteed A+
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1. A couple who are both carriers for the gene for cystic fibrosis have two children who have cystic fibrosis. What is the probability that their next child will have cystic fibrosis? (Assume parents are heterozygous) 
a) 0% 
b) 25% 
c) 50% 
d) 75% 
e) 100% - ️️b) 25% 
 
2. In crossing a homozygous recessive with a heterozygote, what is the chance of 
getting an offspring with the homozygote recessive phenotype? 
a) 0% 
b) 25% 
c) 50% 
d) 75% 
e) 100% - ️️c) 50% 
 
3. In snapdragons,...
![BIS 2A Midterm 3 Questions And Answers](/docpics/3587557/65240fa07e3ff_3587557_121_171.jpeg)
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BIS 2A Midterm 3 Questions And Answers
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1. Which of the following activities does the ribosome perform? 
a. Establishment of the reading frame and formation of peptide bonds 
b. Polymerization of dNTPs 
c. Addition of the correct amino acid to the 3'OH of tRNA 
d. Removal of incorrect amino acids 
e. c and d are correct. - ️️a. Establishment of the reading frame and formation of peptide bonds 
 
2. A missense mutation is ... 
a. When the two bases in the double helix don't match 
b. When the sequence of a codon is changed, but i...
![BIS 2A Midterm 55 Study Questions And Answers](/docpics/3587617/6524127b99b4c_3587617_121_171.jpeg)
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BIS 2A Midterm 55 Study Questions And Answers
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Which of the following statements best describes covalent bonds? - ️️the sharing of an electron pair between atoms; relatively strong bond 
 
Which of the carbon atoms is most oxidized? - ️️CO2 
 
How can living things grow and display increasing levels of order, reorganizing random molecules into complex organized molecules? - ️️living things capture the energy from their environment, like nearby exergonic reactions, and use that energy to create order 
 
Early in earths history the...
![Bis 2A Midterm 242 Review Study Questions And Answers](/docpics/3587515/65240dffadf1e_3587515_121_171.jpeg)
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Bis 2A Midterm 242 Review Study Questions And Answers
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What does a protein do to be able to react with other molecules? - ️️produced as a linear stretch but folded up to be able to react 
 
What are catalysts made of? - ️️proteins plus other small molecules 
 
Why does life use a catalyst for every reaction? - ️️A. make it go faster 
B. emphasize the rare useful reactions and avoid toxic alternatives 
C. to optimize rates for current conditions 
D. to allow species to compete with other species by employing a specialized lifestyle 
 
Wha...
![BIS 2A Midterm 55 Questions And Answers](/docpics/3587670/652414985b8dd_3587670_121_171.jpeg)
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BIS 2A Midterm 55 Questions And Answers
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What are prokaryotes? - ️️single-celled organisms with neither a membrane-bound nucleus nor other lipid membrane-bound organelles 
 
What two phylogenetically distinct groups make up prokaryotes? - ️️bacteria and archaea 
 
What are the three domains of life? - ️️bacteria, archaea, and eukarya 
 
TRUE or FALSE: an ancestor of modern archaea is believed to have given rise to eukarya. - ️️TRUE 
 
Although bacteria and archaea share many morphological, structural, and metabolic attr...
![BIS 2A Midterm 2|89 Questions And Answers|100% Correct](/docpics/3587424/65240a3d4e4b0_3587424_121_171.jpeg)
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BIS 2A Midterm 2|89 Questions And Answers|100% Correct
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What are proteins made of? - ️️Proteins are made up of amino acids linked together by peptide bonds, as well as the R groups attached to the amino acids (which make them unique and give certain characteristics) 
 
Proteins are formed through the process of condensation, when the carboxylic group and the amine group of the amino acids bind together to produce water, forming a peptide bond. 
 
How the various levels of organization (primary, secondary...) affect the structure and activity of a...
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