biology

• prokaryotes have no nucleus and their DNA floats freely within the cytoplasm
• whats the equation for photosynthesis?

  carbon dioxide + water -> glucose + oxygen
• Name the process in which a cell develops new sub-cellular structures to let it perform a specific function


  cell differentiation
• Name the substance that strengthens the cell walls of xylem cells


  lignin
• Which part of the enzyme binds with the substrate?

  active site
• hich of the following are NOT key components of the human circulatory system?


  capillaries
• Deoxygenated blood arrives at the lungs from the heart via which artery?

  The pulmonary artery
• compare how bacteria and viruses cause symptoms in a host

  bacteria are single cells that can survive on their own
• compare how bacteria and viruses cause symptoms in a host

  Bacteria are single cells that can survive on their own, viruses cause infections by entering and multiplying inside the host healthy cells
• whats the definition of active transport?


  is the movement of substances against their concentration gradient. The substance moves from an area of low concentration to an area of high concentrations, across a partially permeable membrane.
• what is the definition of osmosis?

  he diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a selectively permeable membrane
• whats the definition of diffusion?


  movement of particles from an area of higher concentration to an area of lower concentration
• compare aerobic and anaerobic respiration?

  Aerobic respiration occurs with oxygen and releases more energy but more slowly. Anaerobic respiration occurs without oxygen and releases less energy but more quickly.
• what is glucose symbol equation?

  C6H12O6
• what is the symbol equation for carbon dioxide?


  6CO2
• what is the symbol equation for water?


   6H2O 
• what is the symbol equation for oxygen?


  6O2.
• what is the equation for respiration?


  glucose + oxygen -> carbon dioxide + water
• describe two differences between the transpiration steam and translocation


  transpiration involves the xylem, translocation involves the phloem
• 3 factors that affect the rate of diffusion


  temperature, concentration gradient, surface area
• whats a pathogen?


  a microorganism that can cause infectious disease
• give an example of eukaryotic cells?

  animal, plant and fungi cells
• what cell is prokaryotic?

  bacteria cells
• prokaryotic cells are smaller than eukaryotic
• how do you work out magnification?

  size of image divided by real size of object