Genetics and Cell Biology Fundamentals

Estratto della scheda di revisione

Course Outline

  1. DNA structure and base pairing
  2. Genes, chromosomes and karyotypes
  3. Mitosis, meiosis and fertilisation
  4. Inheritance and Punnett squares
  5. Mutations and genetic disorders
  6. Cell theory and cell types
  7. Cell organelles and functions
  8. Surface area and cell size
  9. Scientific investigations and variables
  10. Bioethics and genetic engineering
  11. Cloning and DNA editing

1. DNA structure and base pairing

Key Concepts & Definitions

  • Deoxyribonucleic acid : Deoxyribonucleic acid is a nucleic acid that carries genetic code and is located in the nucleus of cells.
  • Nucleotide : A nucleotide is a DNA subunit made of deoxyribose sugar, a phosphate group, and a nitrogenous base.
  • Chargaff’s rule : Chargaff’s rule states that in DNA adenine pairs with thymine and cytosine pairs with guanine.
  • DNA double helix : A DNA double helix is a double-stranded, helical structure where the strands are twisted around each other.
  • Hydrogen bonding : Hydrogen bonding is the attraction between DNA bases that holds complementary pairs together.

Essential Points

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Anteprima del quiz

1. What is the correct base-pairing rule in double-stranded DNA?

2. Which statement best describes a DNA nucleotide?

3. What is a gene?

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Anteprima delle flashcard

DNA structure — base pairing?

A pairs with T; C pairs with G.

Genes — function?

Carry instructions for specific proteins.

Chromosomes — composition?

DNA tightly coiled with proteins.

Karyotype — purpose?

Displays chromosome number and structure.

Mitosis — outcome?

Genetically identical diploid cells.

Meiosis — purpose?

Produce haploid gametes for reproduction.

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Domande frequenti

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