bio - chp 7 reading guide 7.1 - 7.14

a student has been shrunk to fit inside the thylakoid space of a granum. how many layers of phospholipids would he or she need to cross through to get completely out of the mesophyll cell?

8 layers

T or F: more than half of the worlds plant and animal spaces live in tropical rain forests

True

a toxin is found to inhibit the uptake of CO2 into plant leaves. this toxin would most directly affect the

calvin cycle

what substance provides the majority of the atoms that make up the sugar produced by photosynthesis?

carbon dioxide

a plants leaves are the primary site of photosynthesis. a plants leaves would be expected to have a large amount of ____

chloroplasts

________ is a long term change of the global climate for long periods of time

climate change

list three benefits of photosynthetic products to humans

food, fuel, and removal of CO2 from the atmosphere

T or F: during photosynthesis, CO2 is split to release oxygen gas

False, O2 gas is created as a result of splitting H2O

T or F: a photoautotroph is a type of heterotroph that uses solar energy to produce sugars

False, a photoautotroph is an autotroph

T or F: each turn of the calvin cycle produces one molecule of glucose

False, one turn of the calvin cycle makes a three-carbon sugar called G3P. it would take two turns of the calvin cycle to make a six-carbon glucose

T or F: red wavelengths of light have more energy than purple wavelengths of light

False, red wavelengths of light have less energy than purple wavelengths

the calvin cycle is cyclic because

RuBP is regenerated in the final chemical reaction

what links photosystem I with photosystem II?

an electron transport chain

the two complexes of pigments that constitute a photosystem include ____ and the ____

light-harvesting complex, reaction-center complex

________ is the process by which a plant adds O2 to RuBP instead of CO2

photorespiration

a new bacterium is discovered in Lake Superior. scientists are able to determine that these bacteria produce oxygen gas. what is likely to be true about these organisms

the bacteria are likely photoautotrophs and perform photosynthesis

if a scientist removes the pair of cholorophyll a molecules from the reaction-center complex, then what consequence would be likely to occur?

the primary electron acceptor would capture boosted electrons from the light-harvesting complex

a plant uses the products of the calvin cycle for

to make starch, cellulose, and molecules used in protein synthesis