Preview

Biology Study guide

Satisfactory Essays
Open Document
Open Document
1096 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Biology Study guide
Biology Study Guide Which one of the following statements is false? Selected Answer: a.
Factors that alter DNA and make cells cancerous are called carcinogens.

Which one of the following is false? Selected Answer: b. DNA packing tends to promote gene expression.

Silencers are sites in DNA that Selected Answer: c. bind repressor proteins to inhibit the start of transcription. Proteins that bind to DNA and turn on operons by making it easier for RNA polymerase to bind to a promoter are called Selected Answer: d. activators.

Which of the following best expresses the degree of success that has been attained in the cloning of humans? Selected Answer: d. A cloned human embryo developed to the blastocyst stage.

Which one of the following is false? Selected Answer: d. A mutation in a tumor-suppressor gene can stop cell division immediately.

Which of the following permits a single gene to code for more than one polypeptide? Selected Answer: b. alternative RNA splicing

Which of these mechanisms of controlling gene expression occurs outside of the nucleus? Selected Answer: e. translation

RNA splicing involves the Selected Answer: c. removal of introns from the molecule.

The expression of the tryptophan operon is controlled by Selected Answer: c. a repressor that is active when it binds to tryptophan.

Which one of the following statements is false? Selected Answer: a. Factors that alter DNA and make cells cancerous are called carcinogens.

Which one of the following is false? Selected Answer: b. DNA packing tends to promote gene expression. Silencers are sites in DNA that Selected Answer: c. bind repressor proteins to inhibit the start of transcription.

Proteins that bind to DNA and turn on operons by making it easier for RNA
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    HSC Biology Syllabus - Genetics: The Code Broken? (Option) - All Dot Points Answered
    • 7073 Words
    • 23 Pages

    HSC Biology Syllabus - Genetics: The Code Broken? (Option) - All Dot Points Answered

    One of the strands coding for the gene exposes itself to the nucleoplasmThe enzyme, RNA polymerase moves along the strand, attaching loose RNA nucleotides to the DNA, with A-U and C-G, until the whole gene is copied.…

    • 7073 Words
    • 23 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Exam 4 Review Biology 110
    • 1541 Words
    • 6 Pages

    Exam 4 Review Biology 110

    B. RNA polymerase moves along DNA, adding complimentary ribonucleotides, until the end of the gene is reached…

    • 1541 Words
    • 6 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    AP Biology Study Guide
    • 455 Words
    • 3 Pages

    AP Biology Study Guide

    Properties of water (+H-O+O) 1. Polar Molecule-Opposite ends attract 2. High Heat Capacity-Bonds break at high temp 3. Cohesive- Water attracts water 4. Solvent- Ability to dissolve 5.…

    • 455 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Biology Final Study Guide
    • 869 Words
    • 4 Pages

    Biology Final Study Guide

    CHAPTER 6 (SECTION 6.3) Bonding Carbon- 4 bonds attached Oxygen- 2 bonds attached Hydrogen- 1 bond attached Purines vs. Pyrimidines Purines- adenine & guanine Pyrimidines- cytosine, thymine (DNA), uracil (RNA) Pentose vs. Hexose sugars Pentose- 5 carbon atoms Hexose- 6 carbon atoms Carbohydrates Empirical Formula CH2O Hydrolysis vs. Condensation Reactions Hydrolysis- using water to break down protein into amino acids Condensation Reaction- nucleotides Enzymes- a protein that speeds up a chemical reaction - usually end in -ase…

    • 869 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    For Reference
    • 970 Words
    • 4 Pages

    For Reference

    The lux R, which has its own promoter and is transcribed in the opposite direction from the lux operon, could not be transcribed from the same strand because the RNA polymerase recognizes a promoter sequence only in the direction of 5’ to 3’, and the lux R gets transcribed in the opposite direction from the lux operon. Thus, the transcriptions of luxR and lux operon have to occur on two different strands including coding strand and template strand.…

    • 970 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Revision Questions
    • 510 Words
    • 3 Pages

    Revision Questions

    2. Describe the operon hypothesis and discuss how it explains the control of messenger RNA production and the regulation of protein synthesis in bacterial cells.…

    • 510 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Better Essays

    Biology Chapter 1 Study Guide
    • 827 Words
    • 3 Pages

    Biology Chapter 1 Study Guide

    Ecosystem - A community interacting with it's physical environment through the transfer of energy and materials…

    • 827 Words
    • 3 Pages
    Better Essays
    Read More
  • Satisfactory Essays

    Reversing Entries
    • 388 Words
    • 2 Pages

    Reversing Entries

    genes code for particular proteins. In eukaryotic cells in the dictation this stage from DNA…

    • 388 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Biology study guide
    • 292 Words
    • 2 Pages

    Biology study guide

    Describe how the metabolism of proteins and fats may be similar or different to the metabolism of glucose.…

    • 292 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Satisfactory Essays

    Biology Study Guide
    • 985 Words
    • 4 Pages

    Biology Study Guide

    1. Number the events in the action potential in the order in which they occur.…

    • 985 Words
    • 4 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    Biology Study Guide
    • 1845 Words
    • 8 Pages

    Biology Study Guide

    - Abiotic is the physical aspects of a habitat and biotic is the organisms in a habitat.…

    • 1845 Words
    • 8 Pages
    Powerful Essays
    Read More
  • Good Essays

    Advanced Biology Final Exam: Question Pape
    • 2426 Words
    • 10 Pages

    Advanced Biology Final Exam: Question Pape

    Which of the following types of mutation, resulting in an error in the mRNA just after the AUG start of translation, is likely to have the most serious effect on the polypeptide product?…

    • 2426 Words
    • 10 Pages
    Good Essays
    Read More
  • Good Essays

    Genetic Engineering
    • 541 Words
    • 3 Pages

    Genetic Engineering

    Gene cloning and genetics engineering were made possible by the discovery of restriction enzymes. These enzymes protect the bacteria against intruding DNA from other organisms, such as phages or other bacteria cells. They work by cutting up the foreign DNA, a process called restriction. Most restriction enzymes are very specific, recognizing short nucleotide sequences in DNA molecules and cutting at specific points within these sequences. The bacterial cell protects its own DNA from restriction by adding methyl groups(CH3)to adenines or cytosines within the sequence recognized by the restriction enzyme. The restriction fragments are double-stranded DNA fragments with at least one single-stranded end, called a sticky end. These short extensions will form hydrogen-bonded base pairs with complementary single-stranded stretches on other DNA molecules cut with the same enzymes. The unions formed in this way are only temporary, because only a few hydrogen bonds hold the fragments together. The DNA functions can be made permanent , however, by the enzyme DNA ligase, which seals the…

    • 541 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Regulation in Eukaryotic Cells
    • 764 Words
    • 4 Pages

    Regulation in Eukaryotic Cells

    Gene expression is the ability of a gene to produce a biologically active protein. This process is regulated by the cells of an organism, it is very important to the survival of organisms at all levels. This is much more complex in eukaryotes than in prokaryotes. A major difference is the presence in eukaryotes of a nuclear membrane, which prevents the simultaneous transcription and translation that occurs in prokaryotes. Initiation of protein transcription is started by RNA polymerase. The activity of RNA polymerase is regulated by interaction with regulatory proteins; these proteins can act both positively, as activators, and negatively as repressors. An example of gene regulation in cells is the activity of the trp operon. The trp operon encodes the genes for the synthesis of tryptophan. This type of gene, like the lac operon, is regulated by a repressor that binds to the operator sequences. The activity of the trp repressor is enhanced when it binds tryptophan; in this capacity, tryptophan is known as a corepressor. Since the activity of the trp repressor is enhanced in the presence of tryptophan, the rate of expression of the trp operon is graded in response to the level of tryptophan in the cell. Another example of gene regulation in cells is gene amplification. This is a Technique by which selected DNA from a single cell can be duplicated indefinitely until there is a sufficient amount to analyse by conventional genetic techniques.…

    • 764 Words
    • 4 Pages
    Good Essays
    Read More
  • Powerful Essays

    Operons
    • 2060 Words
    • 9 Pages

    Operons

    II. In prokaryotic cells (and viruses) the control of gene activity is often in the form of operons.…

    • 2060 Words
    • 9 Pages
    Powerful Essays
    Read More

Related Topics