Podcast
Questions and Answers
Which of the following sequences correctly lists the components of an organism's genetic structure from largest to smallest?
Which of the following sequences correctly lists the components of an organism's genetic structure from largest to smallest?
- Chromosome - Gene - DNA - Nucleotide
- Chromosome - DNA - Gene - Nucleotide (correct)
- DNA - Chromosome - Gene - Nucleotide
- Gene - DNA - Chromosome - Nucleotide
A scientist is studying a molecule and identifies a deoxyribose sugar, a phosphate group, and a nitrogenous base. This molecule is a:
A scientist is studying a molecule and identifies a deoxyribose sugar, a phosphate group, and a nitrogenous base. This molecule is a:
- Nitrogenous base.
- DNA molecule.
- Nucleotide. (correct)
- DNA strand.
During which phase of the cell cycle does DNA replication occur, ensuring that each daughter cell receives a complete set of genetic information?
During which phase of the cell cycle does DNA replication occur, ensuring that each daughter cell receives a complete set of genetic information?
- Prophase.
- Cytokinesis.
- Mitosis.
- Interphase. (correct)
A researcher observes a group of cells exhibiting uncontrolled division, leading to the formation of a tumor. This phenomenon is most likely a result of:
A researcher observes a group of cells exhibiting uncontrolled division, leading to the formation of a tumor. This phenomenon is most likely a result of:
Which component forms the 'sides' or backbone of the DNA ladder structure?
Which component forms the 'sides' or backbone of the DNA ladder structure?
What distinguishes a DNA molecule from a DNA strand?
What distinguishes a DNA molecule from a DNA strand?
Cytokinesis is best described as:
Cytokinesis is best described as:
Which of the following is an example of a carcinogen that can increase the risk of cancer?
Which of the following is an example of a carcinogen that can increase the risk of cancer?
What is the potential outcome of a mutation in a cell's DNA?
What is the potential outcome of a mutation in a cell's DNA?
If a new medication targets and repairs damaged DNA to prevent uncontrolled cell division, it would most likely be used in the treatment of:
If a new medication targets and repairs damaged DNA to prevent uncontrolled cell division, it would most likely be used in the treatment of:
Flashcards
Nucleotide
Nucleotide
The building block of DNA, consisting of a deoxyribose sugar, phosphate group, and a nitrogenous base.
Deoxyribose sugar and phosphate
Deoxyribose sugar and phosphate
The 'sides' or backbone of the DNA ladder.
Nitrogenous bases
Nitrogenous bases
Form the 'steps' of the DNA ladder, pairing A with T, and C with G.
DNA molecule
DNA molecule
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DNA strand
DNA strand
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Interphase
Interphase
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Mitosis
Mitosis
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Cytokinesis
Cytokinesis
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Carcinogens
Carcinogens
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Mutation
Mutation
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Study Notes
- Organization hierarchy goes from Geno to chromosome to chromatid to chromatins to DNA to gene to nucleotide, which is made up of deoxyribose sugar, phosphate group, and nitrogenous bases.
DNA Structure
- A nucleotide is the building block of DNA, forming the steps in the ladder.
- Nucleotides consist of a deoxyribose sugar, a phosphate group, and a nitrogenous base.
- Deoxyribose sugar and phosphate make up the sides of the DNA ladder.
- Nitrogenous bases form the steps, pairing A with T and C with G.
- Many nucleotides together form a long DNA strand.
DNA Strand vs. Molecule
- A DNA molecule is the entire duplex structure of DNA.
- A DNA strand is a single chain of nucleotides and a part of the DNA molecule.
- DNA molecules have two strands.
Cell Cycle
- DNA replication occurs in interphase.
- Mitosis is cell division.
- Cytokinesis is the division of the parent cell into two daughter cells.
Cancer
- Cancer occurs when cells divide uncontrollably, forming a tumor.
- Cancer cells can spread through the blood or lymph, forming new tumors.
- Uncontrolled growth is often caused by carcinogens that damage DNA.
- Carcinogens include cigarette smoke, chemicals, and UV radiation.
- A mutation is a change in a cell’s DNA, which can be natural or caused by chemicals or radiation.
- Some mutations are harmless, while others can cause cancer.
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