Biology lab quiz 7
ATP
Cellular respiration converts the chemical energy of food to chemical energy stored in...... to do cellular work.
Oxygen releases carbon dioxide
Cellular respiration takes in ..... and releases ......
Move farther from the origin than the largest (heaviest) pigment
If all pigments are equally soluble in the solvent used in paper chromatography , the smallest ( lightest) pigment would.....
Glucose to NADH to ETC to oxygen to atp
During cellular respiration, most of the energy flows in what sequence?
Oxygen water NADPH
During the first stage of photosynthesis photolysis of water gives off ....
Chlorophyll A is the most abundant pigment and it reflects green
Having observed the pigments found in paper chromatography, why are leaves green?
Based on molecular weight
How do pigments seperate in paper chromatography?
Chlorophyll b yellow green, chlorophyll a blue green, xanthophyll light yellow, carotene yellow orange
In paper Chromatography experiment, in what order do the pigments appear starting closest to origin?
Anthocyanin
Name a water soluble plant pigment
Absorbance at different wavelengths
Once pigments in the magnolia leaf were separated, we used spec 20 to measure the......
Light energy to carbohydrate
Photosynthesis converts...... energy to chemical energy stored in .......
Carbon dioxide and water into carbohydrates and oxygen
Photosynthesis is the process by which plants change....
Carbon dioxide releases oxygen
Photosynthesis takes in.... and releases....
Water NADPH
The 2 most important products of the first stage in photosynthesis are ...
Light reactions powered by sunlight and occurs in thylakoids membranes of chloroplasts
The first stage of photosynthesis is called the....
Calvin cycle which starts and ends with ribulose biphosphate (rubp) that is recycled and this occurs in the stroma of chloroplasts
The second stage of photosynthesis is called..
Glucose
The sugar glyceraldehyde 3 phosphate can be used by the plant cell to make....
Paper chromatography
The technique used in lab to separate photosynthetic pigments from a magnolia leaf is known as....
Violet (450) and red (650)
What colors of light are are most used in photosynthesis?
The oxidation of of glucose to CO2 and recreating electron energy used to make atp
What is cellular respiration?
Removing electrons
What is oxidation?
Adding electrons
What is reduction?
C6H12O6 + 6O2 = 6CO2 + 6H2O + ATP
What is the balanced equation of cellular respiration
6CO2 + 6H2O = C6H12O6 + 6O2
What is the balanced equation of photosynthesis
Absorbance
What is the dependent variable on the absorption spectra graph of photosynthetic pigments?
Wave length
What is the independent variable on the absorption spectra graph of photosynthetic pigments?
536
What is the molecular weight of carotenes
893
What is the molecular weight of chlorophyll a?
908
What is the molecular weight of chlorophyll b
568
What is the molecular weight of xanthophylls
Fixation of carbon dioxide to form 3 carbon sugar called glyceraldehyde 3 phosphate as end product
What is the most important resutl of the second stage of photosynthesis
6CO2=2G3P=1 glucose
What is the right number of molecules in the equation _co2=_g3p=_glucose
Temporary carrier of electrons it will deposit at ETC
What is the role of NAD+ in cellular respiration ?
Photosynthetic pigment, chloroplasts with thylakoids membranes, sunlight, water, carbon dioxide
What must plants have in order to photosynthesize?
Anabolic
What type of metabolic pathway is photosynthesis?
Reduced
When NADP+ accepts two electrons and a hydrogen ion we say it has been ....
when there's light
When does a plant photosynthesize
Always
When does a plant respire?
Decreases
When plant leaves are placed in a closed container and then exposed to light, CO2 pressure......
Increases
When plant leaves are placed in a closed container in the dark, CO2 pressure.....
In the areas where chlorophyll had been
When the pigments anthocyanin and chlorophyll were removed from a coleus leaf, Iki reagent was added to the leaf to observe starch deposition. Where was starch present?
450-475
Where do carotenes peak?
475
Where do xanthophylls peak ?
Purple blues (400-475) and red oranges (575-700)
Which colors of light correspond to the most absorbed wavelengths by chlorophyll A?
Green yellow (475-550)
Which light wavelengths and colors are least absorbed by chlorophyll A ?
425 and 675 nm
Which wave lengths of light are optimally absorbed by chlorophyll A?
475nm and 640nm
Which wavelengths of light does chlorophyll B absorb best ?
Different accessory pigments including chlorophyll b and carotenoids
Why do different kinds of leaves vary in their shades of green?
Breakdown of chlorophyll a unmasks carotenoids
Why do leaves change color in autumn?
No because these wavelengths are least absorbed by chlorophyll a
Would you expect a plant to be able to photosynthesize if exposed to only green wavelengths? Why?
Anthocyanin in water, chlorophyll in ethanol
in the experiment where the pigments anthocyanin and chlorophyll were removed from a coleus leaf, we dissolved anthocyanin in........ and chlorophyll in......
