Podcast Beta
Questions and Answers
What significant discovery did Robert Brown make in 1831?
Which duo proposed the double-helix structure of DNA in 1953?
What does the endosymbiotic theory propose about organelles?
Which of the following is a property of viruses?
Signup and view all the answers
What is the classification debate surrounding viruses primarily about?
Signup and view all the answers
What is the smallest known cell type, often cited in biological studies?
Signup and view all the answers
Who first discovered cells, paving the way for cell biology?
Signup and view all the answers
What is a primary function of cells in living organisms?
Signup and view all the answers
What is the significance of Yamanaka and Gurdon's discovery in 2012?
Signup and view all the answers
Which one of the following statements best describes the viral invasion process?
Signup and view all the answers
Study Notes
Viruses and The Cell Theory:
- Viruses challenge the traditional cell theory because they lack the basic cellular structures found in living organisms
- Viruses carry genetic material (DNA or RNA) that they use to hijack the host cell's replication and assembly processes
- Viruses are obligate intracellular parasites, meaning they cannot reproduce or carry out essential life processes independently, relying entirely on host cells for survival and propagation
- Viruses have evolved mechanisms to enter host cells by binding to surface receptors, redirecting the host cell's resources to produce new viral particles
- There is ongoing debate about whether viruses should be classified as living or non-living entities; some scientists consider them "biological entities," blurring the line between living and non-living matter
What is a Cell?
- A cell is the fundamental unit of life, responsible for both structure and function in living organisms
- The study of cells, known as Cell Biology, encompasses their structure, function, and behavior
- Robert Hooke was the first biologist to discover cells
- All organisms are composed of cells, either unicellular or multicellular
- Mycoplasmas are the smallest known cells (they have a diameter of about 0.1 µm)
- Cells provide structure to living beings and convert nutrients from food into energy
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore the groundbreaking discoveries by prominent scientists in cell biology, from Robert Brown's identification of the cell nucleus to Watson and Crick's double-helix DNA model. The quiz also delves into the role of viruses and the challenges they pose to traditional cell theory, providing insights into the nature of life at a cellular level.
