Biology lab quiz 7

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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......


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