10 Questions
Which statement accurately describes the structure of DNA?
Double-stranded helical structure
Who discovered the cell theory?
Schleiden and Schwann
Which of the following correctly pairs the nitrogenous bases in DNA?
Adenine with Thymine, Guanine with Cytosine
What structural feature differentiates plant cells from animal cells?
Plant cells have a cell wall and animal cells do not
Which statement is not part of the cell theory?
DNA is arranged in a double helix structure
Which branch of botany is concerned with the study of different tissues present in a plant body?
Histology
What is the study of mosses called?
Bryology
Which field focuses on the gross internal details of plant parts like stems, leaves, flowers, and roots?
Anatomy
Which of the following accurately defines the study of lichens?
Lichenology
What aspect of plants does external morphology focus on?
Physical external characters
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.
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.
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