WORLD OF CELL+ACCESS CODE >CUSTOM<
17th Edition
ISBN: 9781323628669
Author: Hardin
Publisher: PEARSON C
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Textbook Question
Chapter 1, Problem 1.7PS
Wrong Again. Explain why each of the following statements is false:
(a) Because of the physical nature of light, resolution of cellular structures smaller than 200 nm can never be achieved.
(b) Fluorescence microscopy can allow us to visualize cells but cannot help identify them.
(c) Because all DNA molecules have similar chemical composition, it is not possible to separate and characterize individual DNA molecules.
(d) The best way to carry out a scientific experiment is to try to prove a hypothesis by varying all the relevant conditions.
(e) The flow of genetic information is always from DNA to RNA to protein.
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mutation simulation
BIOLOGY ACTIVITY -Gene Mutations and Proteins
Objective: To demonstrate how gene mutations affect the production of proteins?
Procedure:
Use the following base sequence of one strand of an imaginary DNA molecule: AATTGAACACATGCGCCC.
2. Write the base sequence for an mRNA strand that would be transcribed from the given DNA sequence. Place your results in the table below.
Use your codon table provided below to determine the sequence of amino acids in the resulting protein fragment. Place your results in the table below.
If the fifth base in the original DNA strand were changed from G to C, how would this affect the resulting protein fragment? Write the new protein fragment in the table below.
If G were added to the original DNA strand after the third base, what would the resulting mRNA look like? How would this addition affect the protein? Show your results in the table below.
Data:
mRNA from
Step 2
Protein Sequence from Step 3
Protein Sequence from Step…
Chapter 1 Solutions
WORLD OF CELL+ACCESS CODE >CUSTOM<
Ch. 1 - What evidence led scientists to develop the basic...Ch. 1 - Why is a high degree of antibody-antigen...Ch. 1 - You have discovered a defective gene that allows...Ch. 1 - Prob. 1.3CCCh. 1 - The Historical Strands of Cell Biology. For each...Ch. 1 - QUANTITATIVE Cell Sizes. To appreciate the...Ch. 1 - QUANTITATIVE Sizing Things Up. To appreciate the...Ch. 1 - Problem Set QUANTITATIVE Limits of Resolution Then...Ch. 1 - The Contemporary Strands of Cell Biology. For each...Ch. 1 - The Facts of Life. Each of these statements was...
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- Genetics - Choose the following answer -arrow_forwardDynamic instability causes microtubules either to grow or to shrink rapidly. Consider an individual microtubule that is in its shrinking phase. What would need to happen at the end of the microtubule in order for it to stop shrinking and to start growing again? Be specific! What would happen if only GDP, but no GTP, were present in the solution? What would happen if the solution contained an analog of GTP that cannot be hydrolyzed?arrow_forwardVISUALIZE Sketch a pyrimidine nucleotide subunit that would be found only in RNA. Circle and label the three components that make up this type of nucleotide. Explain what changes in the functional groups of this subunit would have to occur for it to be found in a DNA molecule.arrow_forward
- Need help. Contrast DNA replication with gene expression (transcription→translation)—when does each occur? What molecules are involved? How much of the DNA is utilized?arrow_forwardTranslation of DNAarrow_forwardCentral Dogma of Molecular Biology from DNA to RNA to Protein, discussing the principles underlying the transfer of information in a biologic system and its regulation. However, recent research seems to challenge certain aspects of Crick’s Central Dogma. Does the Central Dogma still stand today? If not, can you find an example for a type of information transfer that is not explicitly covered by the Central Dogma (or even violates it)?arrow_forward
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