Podcast
Questions and Answers
Which statement accurately describes the structure of DNA?
Which statement accurately describes the structure of DNA?
Who discovered the cell theory?
Who discovered the cell theory?
Which of the following correctly pairs the nitrogenous bases in DNA?
Which of the following correctly pairs the nitrogenous bases in DNA?
What structural feature differentiates plant cells from animal cells?
What structural feature differentiates plant cells from animal cells?
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Which statement is not part of the cell theory?
Which statement is not part of the cell theory?
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Which branch of botany is concerned with the study of different tissues present in a plant body?
Which branch of botany is concerned with the study of different tissues present in a plant body?
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What is the study of mosses called?
What is the study of mosses called?
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Which field focuses on the gross internal details of plant parts like stems, leaves, flowers, and roots?
Which field focuses on the gross internal details of plant parts like stems, leaves, flowers, and roots?
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Which of the following accurately defines the study of lichens?
Which of the following accurately defines the study of lichens?
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What aspect of plants does external morphology focus on?
What aspect of plants does external morphology focus on?
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Study Notes
The Cell Theory
- The cell theory was discovered by German botanist Schleiden and German zoologist Schwann.
- The cell theory states that all living organisms are made up of cells, which are the basic structural and functional unit of life.
- All cells arise from pre-existing cells.
Plant and Animal Cells
- Plant cells have a cell wall in addition to a cell membrane.
- Animal cells only have a cell membrane, lacking a cell wall.
DNA Structure
- DNA is arranged in a double helix structure consisting of two strands.
- The two strands are connected through nitrogenous bases.
- Each nitrogenous base is connected to a sugar-phosphate backbone.
- Nucleotide pairs consist of one purine (Adenine or Guanine) and one pyrimidine (Thymine or Cytosine).
- Adenine bonds with Thymine through two hydrogen bonds.
- Guanine bonds with Cytosine through three hydrogen bonds.
Botany
- Botany is the study of different characters of a plant.
Morphology
- Morphology is the study and description of different plant parts or organs.
- It consists of two branches:
- Internal morphology: Study of internal characters of plants.
- External morphology: Study of external physical characters of plants.
Other Subfields of Botany
- Histology: Study of different tissues present in a plant body.
- Anatomy: Study of gross internal details of plant parts or organs like stem, leaves, flowers, and roots.
- Bryology: Study of mosses.
- Phycology: Study of algae.
- Pteridophyte: Study of ferns.
- Mycology: Study of fungi.
- Lichenology: Study of lichens.
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Description
Quiz on the basics of cell theory, including plant and animal cells, and DNA structure. Learn about the fundamentals of life at the cellular level.
