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AP Intermediate 2nd Year Genetics and Evolution — practice questions — page 6

Explore 210 free Genetics and Evolution questions in AP Intermediate 2nd Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Genetics and Evolution questions and exercises with answers

Showing questions 151–180 of 210.

NEET · Biology · Molecular Basis of Inheritance · Histone Octamer — Gap FillRead the answer and worked solution →The Meselson-Stahl experiment proved that DNA replication isRead the answer and worked solution →During transcription, the strand of DNA actually read by RNA polymerase isRead the answer and worked solution →Which eukaryotic RNA polymerase synthesises the mRNA precursor (hnRNA)?Read the answer and worked solution →Which of the following is the universal start codon?Read the answer and worked solution →Approximately how much of the human genome codes for proteins?Read the answer and worked solution →The Central Dogma of molecular biology states that genetic information flows:Read the answer and worked solution →Okazaki fragments are produced during DNA replication on which strand?Read the answer and worked solution →NEET · Bio · Principles of Inheritance · Mendel — TraceRead the answer and worked solution →Translation of mRNA into protein occurs on which cellular structure?Read the answer and worked solution →Introns are best described asRead the answer and worked solution →A nucleosome consists ofRead the answer and worked solution →Naming the processesRead the answer and worked solution →NEET · Biology · Molecular Basis of Inheritance · Operon ComponentRead the answer and worked solution →NEET · Biology · Molecular Basis of Inheritance · Project to YearRead the answer and worked solution →During transcription, the enzyme that synthesises mRNA from DNA is:Read the answer and worked solution →DNA or RNA?Read the answer and worked solution →The central dogma of molecular biology states the flow of information asRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Punnett — Gap FillRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Tap True-Breeding CrossesRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Mendel Concept — MemoryRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Genotype RatioRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Dominant or Recessive — PeaRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Linkage and Crossing OverRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Pedigree SymbolRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Sex Determination TypeRead the answer and worked solution →NEET · Bio · Principles of Inheritance · Type of InheritanceRead the answer and worked solution →A person with blood group AB has genotypeRead the answer and worked solution →The ABO blood-group system is an example ofRead the answer and worked solution →The phenotypic ratio in the F₂ of a Mendelian dihybrid cross (with two independently assorting genes) isRead the answer and worked solution →

Worked practice questions

NEET · Biology · Molecular Basis of Inheritance · Histone Octamer — Gap Fill

Read exercise and reference answers
Missing parts
  1. Answer
    2
    Choices
    1. 1
    2. 2
    3. 4
    4. 8
  2. Answer
    147
    Choices
    1. 100
    2. 147
    3. 200
    4. 300
Complete the statement
A nucleosome has a histone octamer made of {0} copies each of H2A, H2B, H3, and H4, wrapped by about {1} bp of DNA.
Instructions
Fill the nucleosome composition.

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The Meselson-Stahl experiment proved that DNA replication is

  1. conservative
  2. discontinuous on both strands
  3. semi-conservative
  4. dispersive
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Correct answer: C. semi-conservative

After one round of replication in ¹⁴N medium, all DNA molecules from ¹⁵N-labelled E. coli had a single intermediate density. That's only possible if each daughter contains one parental strand and one new strand — the semi-conservative model.

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During transcription, the strand of DNA actually read by RNA polymerase is

  1. the coding strand (5′→3′)
  2. neither — RNA polymerase reads its own RNA
  3. the template strand (3′→5′)
  4. both strands simultaneously
Show answer and solution

Correct answer: C. the template strand (3′→5′)

RNA polymerase reads the template strand in the 3′→5′ direction and builds the new RNA in the 5′→3′ direction. The other strand (with the same sequence as the RNA, except T not U) is called the coding strand by convention.

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