HW CH 7

Which of the following leaf types would be the most efficient at absorbing sunlight? A) Small, narrow leaves B) All of these leaf types are equally efficient at absorbing sunlight? C) Needlelike leaves D) Large, broad leaves

Which of the following structures allow for gas exchange between the tissues of a leaf and the atmosphere? A) Cuticle B) Epidermis C) Vascular bundle D) Stomata

True or false, Guard cells open during the day to allow gases to flow through the stomata.

Which of these equations best summarizes photosynthesis? A) 6 CO2 + 6 O2 --> C6H12O6 + 6 H2O B) H2O --> 2 H+ + 1/2 O2 + 2e C) C6H12O6 + 6 O2 --> 6 CO2 + 12 H2O D) 6 CO2 + 6 H2O --> C6H12O6 + 6 O2 E) C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O + Energy

Where does the Calvin cycle occur?

The light reaction of photosynthesis use _____ and produce ______.

Identify the Stroma

Identify the Thylakoid

Identify the inputs and outputs of photosynthesis

Which of the following equations represents photosynthesis? A) C6H12O6 + 6 CO2 --> 6 O2 + 6 H2O B) 6 CO2 + 6 O2 --> C6H12O6 + 6 H2O C) 6H2O 6 O2 --> C6H12O6 + 6 CO2 D) 6 CO2 + 6 H2O --> C6H12O6 + 6 O2 E) C6H12O6 + 6O2 --> 6 CO2 + 6 H2O

In which of the following organelles does photosynthesis take place? A) Central vacuole B) Ribosome C) Mitochondrion D) Chloroplast E) Nucleus

What connects the two photosystems in the light reaction?

What two molecules are produced by the light reactions and used to power the calvin cycle?

What provides electrons for the light reactions?

What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle?

What transports electrons from the light reactions to the calvin cycle?

The light reactions take place in the _____ and the Calvin cycle takes place in the ______.

The ultimate energy source that supports most life on earth is _____.

Plants are photosynthetic autotrophs. What does this mean?

The end products of photosynthesis are ______ and ______.

Which of the following is produced by the light reactions of photosynthesis and consumed by the calvin cycle?

Within the inner membrane of a chloroplast, interconnected sacs of membrane called ______ are suspended in a thick fluid called the ______.

What name is given to the membranous sacs found within a chloroplast?

______ has a longer wavelength than _______.

What phosphorylates ADP to make ATP?

_____ releases energy that is used to pump hydrogen ions from the stroma into the thylakoid.

_____ splits water into 1/2 O2, H+, and e.

Energized electrons from _____ enter an electron transport chain and are then used to reduce NADP+.

Chlorophyll can be found in ______.

In the electromagnetic spectrum, the type of radiation that we call visible light occurs between ______.

As a consequence of the work of the biologist Theodor Engelmann, others showed that chloroplasts absorb light mainly in the _____ and _____ part of the spectrum.

If a plant appears blue to us, what wavelength of light is being reflected?

The energy of wavelengths that appear _____ is least useful to photosynthesis.

Approximately what wavelength of light is best absorbed by chlorophyll a, the pigment that participates directly in the light reactions?

Which wavelength of light is best absorbed by chlorophyll b?

You obtain the pigments called carotenoids in your diet when you eat carrots. Why do carotenoids appear yellow and orange?

Can you tell from these absorption spectra whether red light is effective in driving photosynthesis?

If only chlorophyll a were involved in the light reactions, would blue light (wavelength about 490 nm) be effective in driving photosynthesis?

An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. Based on this information and the absorption spectra shown at left, what role may chlorophyll b and carotenoids play in photosynthesis?

Carbon fixation involves the addition of carbon dioxide to ______.

After 3-PGA is phosphorylated, it receives energized electrons from _____.

How many carbon dioxide molecules must be added to RuBP to make a single molecule of glucose?

In the Calvin cycle, how many ATP molecules are required to regenerate RuBP from five G3P molecules?

The overall function of the Calvin cycle is ______.

Where does the energy for the Calvin cycle come from?

The Calvin cycle makes direct use of _____ to make ______.