biology paper 1

• photosynthesis?


  process which plants produce food
• energy required for photosynthesis comes from?


  the sun
• during photosynthesis light energy is absorbed from the?


  green pigment chlorophyll in chloroplasts
• in photosynthesis some of the gluclose produced is used for?


  immediately for respiration
• gluclose not used for respiration is used to?


  synthesise starch, cellulose, lipids, amino acids and proteins
• rate of photosynthesis is effected by?


  light intensity
• rate of photosynthesis is affected by?

  light intensity, carbon dioxide concentration , temp, and amount of chlorophyll
• an increase of temp increases the rate of photosynthesis up to the?

  temperature optimum for the plant
• the rate of photosynthesis can be measured by measuring rate of?

  • carbon dioxide uptake
• rate of photosynthesis can be measured by measuring rate of?

  carbon dioxide uptake, rate of oxygen production or rate of carbohydrates production
• in the school lab use pondweed such as

  cabomba
• while measuring the rate of photosynthesis supply a source of carbon dioxide in the form of?


  sodium hydrogencarbonate
• while measuring the rate of photosynthesis what should be counted per min?

  bubble production
• when plotting the rate of bubble production over distance the relationship should be a?

  straight line
• biosynthesis?


  production of more complex molecules from simpler ones in living organisms
• which organelle does photosynthesis take place?


  chloroplasts
• description of photosynthesis?


  endothermic reaction
• photon?


  packet of energy of light and other forms of electromagnetic radiation
• enhancing conditions in greenhouses?


  limiting factors reduce yield of crops, conditions set up to minimise losses, provide heat, carbon dioxide concentration and light intensity
• irrigation


  crops are artificially watered by sprinklers and irrigation canals due to a lack of rainfall
• cellular respiration is a 


  exothermic reaction where energy is released from food
• all organisms need energy to?

  undertake the seven life processes
• energy is required to build essential?

  molecules, carbohydrates, proteins and lipids
• energy is also needed for movement in animals and maintaining?


  a constant body temp in mammals and birds
• energy is also needed for cell division?

  homeostasis, active transport and transmission of the nerve impulse
• anarobic respiration of yeast is economically important in the production of?

  alcoholic drinks and bread
• respiratory substrate


  substance broken down by respiration to release energy
• aerobic respiration


  respiration that requires oxygen
• anarobic 


  without oxygen
• body response to exercise

  heart rate/ breathing rate increase, insufficient oxygen available to muscles, muscles less efficiently contract, oxygen debt builds up
• oxygen debt


  amount of extra oxygen required by the body for recovery after vigorous exercise
• what surrounds the nucleus and cytoplasm

  cell membrane
• the nucleus controls the 


  activity of the cells
• the cytoplasm is where

  the chemical reactions in the cell occur
• respiration takes place in 


  mitochondria
• ribosomes 


  involved in protein synthesis
• parts of basic animal cell

  cytoplasm

  nucleus

  mitochondria

  cell membrane
• plant cells have an additional layer

  cell wall
• cells exposed to light have


  chloroplasts for photosynthesis
• eukaryotic


  cell which has a nucleus

  other structures in the cytoplasm which have membranes around them