Cell Biology

• What is a key feature of both animal and plant cells?

  They both have a nucleus
• What does the nucleus contain in eukaryotic cells?

  The genetic material, or DNA
• What is the definition of eukaryotic cells?

  Eukaryotic cells contain their genetic material enclosed in a nucleus
• What are the two additional features of animal and plant cells mentioned?

  Cell membrane and cytoplasm
• Why is it important not to confuse the cell membrane with the cell wall?

  Because they are different structures with different functions
• What type of cells are bacteria classified as?

  Prokaryotic cells
• What is a key characteristic of prokaryotic cells regarding their genetic material?

  The genetic material is not enclosed in a nucleus
• How do prokaryotic cells compare in size to eukaryotic cells?

  Prokaryotic cells are much smaller than eukaryotic cells
• What does the genetic material of bacteria consist of?

  A single loop of DNA and possibly plasmids
• What additional structure do prokaryotic cells have besides the cell membrane?

  A cell wall
• What type of cell wall do prokaryotic cells have?

  A bacterial cell wall
• What do prokaryotic cells contain besides the cell membrane and cell wall?

  Cytoplasm
• What type of questions can be expected in the vision workbook related to cells?

  Questions on eukaryotic and prokaryotic cells
• What are the similarities and differences between eukaryotic and prokaryotic cells?

  Similarities:

  • Both have a cell membrane
  • Both contain cytoplasm

  
  

  Differences:

  • Eukaryotic cells have a nucleus; prokaryotic cells do not
  • Eukaryotic cells are generally larger than prokaryotic cells
• What prefixes should you be able to use after watching the video?

  CTI, milli, micro, and nano
• What types of cells were compared in the last video?

  Eukaryotic cells and prokaryotic cells
• What is a key difference between prokaryotic and eukaryotic cells?

  Prokaryotic cells are much smaller than eukaryotic cells
• What is the standard unit of measurement in science?

  The meter
• Why are objects in biology often measured in smaller units?

  Because they are often much smaller than a meter
• If a German shepherd is around 1 meter long, how many centimeters is that?

  100 centimeters
• What does the prefix "centi" mean?

  One hundredth
• How is 1 centimeter expressed in standard form?

  1 * 10^-2 meters
• What is the width of a little finger approximately equal to?

  1 centimeter
• If 1 centimeter is divided into 10 equal parts, what is each part called?

  1 millimeter
• What does the prefix "milli" mean?

  One thousandth
• How is 1 millimeter expressed in standard form?

  1 * 10^-3 meters
• How long is a dog in millimeters if it is 1 meter long?

  1,000 millimeters
• What is a micrometer?

  One millionth of a meter
• How is 1 micrometer expressed in standard form?

  1 * 10^-6 meters
• What is the typical size range of a human cell in micrometers?

  10 to 20 micrometers
• Why do biologists find micrometers a useful unit?

  Because they are useful for measuring the size of cells
• What is the smallest unit used to measure objects inside cells?

  The nanometer
• What does the prefix "nano" mean?

  One billionth
• How is 1 nanometer expressed in standard form?

  1 * 10^-9 meters
• What is an example of a protein measured in nanometers?

  Haemoglobin
• What is the approximate diameter of a molecule of hemoglobin?

  About 5 nanometers
• What should you be able to describe by the end of the video?

  Order of magnitude
• Why do scientists use the concept of order of magnitude?

  To compare the approximate sizes of different objects
• How many millimeters are in a meter?

  1,000 millimeters
• What does it mean when scientists say two objects are around the same order of magnitude?

  It means the objects are approximately the same size