Introduction to Photosynthesis Review

Plants “look green” because they _____________ green wavelengths of light. absorb reflect reflect Photosynthesis in plants takes place inside which organelle? chloroplasts

A _________________ is a molecule (like chlorophyll) that absorbs energy and is used by green plants to absorb sunlight. Name the two types of chlorophyll ________________ & _________________ pigment Chlorophyll a Chlorophyll b

Blue-violet and red wavelengths Chlorophyll a Chlorophyll b Absorption of Light by Chlorophyll a and Chlorophyll b © Pearson Education, Inc. Publishing as Pearson Prentice-Hall. All rights reserved. Which wavelengths of light do chlorophyll a and chlorophyll b absorb best?

Chlorophyll b Chlorophyll a Absorption of Light by Chlorophyll a and Chlorophyll b They do not absorb green light. Which wavelength of light does Chlorophyll a and chlorophyll b Absorb the least? © Pearson Education, Inc. Publishing as Pearson Prentice-Hall. All rights reserved.

Set of chemical reactions in which the product of one reaction goes on to be the reactant in the next reaction biochemical pathway Use words to fill in the overall chemical reaction for photosynthesis. ___________+___________ __________ + __________ Carbon dioxide water Sugars oxygen

Land plants get the carbon dioxide needed for photosynthesis from the ____________(environment) atmosphere

Name the 2 sets of reactions that make up photosynthesis: #1 is called ___________________. Light-Dependent Reactions #2 is called ________________. Calvin Cycle (or Light-independent Reactions) #1 #2 Photosynthesis

The main photosynthetic pigment in green plants = ___________________ chlorophyll

TRUE or FALSE The Calvin cycle requires light. FALSE: It is light INDEPENDENT Light-Dependent Reactions break apart ________ and give off _______ gas. wateroxygen

______________ are plant pigments that are orange or yellow instead of green Carotenoids

Molecules that interact in a chemical reaction that are written on the left side of a chemical equation are called ________________ reactants

Reactions of photosynthesis that use light energy to produce ATP and NADPH Light-dependent reactions

Pigments that are yellow or orange not green Clusters of light collecting proteins found in the thylakoid Membrane carotenoids photosystems

Process by which plants and some other organisms use sunlight to convert water and carbon dioxide (CO2) into oxygen (O2) and high energy carbohydrates PHOTOSYNTHESIS

6 carbon sugar molecule that is the main product of photosynthesis and is used as the fuel burned by cells glucose

Negatively charged particle found circling the nucleus of an atom electron

Cell organelle containing thylakoid stacks where photosynthesis happens In which part of photosynthesis is oxygen produced? chloroplast Light-dependent reactions

Molecules that are produced during a chemical reaction that are written on the right side of a chemical equation products

Which gas that we need is given off during photosynthesis? oxygen

Label reactants and products for photosynthesis: #1 = ___________________ #2 = ___________________ #3 = ___________________ #4 = ___________________ #5 = ___________________ Carbon dioxide WATER OXYGEN SUGAR Light energy

Give the chemical symbol for these biologically important atoms & ions: Carbon _____ Hydrogen ____ Oxygen ____ Nitrogen ____ Phosphorus ____ C H N P O H+H+

What do you think would happen to the rate of photosynthesis on a cloudy day? It would be slower than on a sunny day

Which part of photosynthesis can continue at night? Calvin cycle

Another name for the Calvin cycle Light INDEPENDENT reactions

Write the chemical equation for photosynthesis ___________+___________ → __________ + __________ 6 CO 2 6 O 2 6 H 2 OC 6 H 12 O 6 Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006

How many molecules of CO 2 are needed to make 1 molecule of glucose? 6