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29 Mar 2018

Answer the following about Respiration and Photosynthesis:

1) In a plant, which of these process (light-dependent reactions, light independent reactions) are occuring during the day?

a) Light-dependent

b)Light-independent

c)Both light dependent and light independent

d) Neither light dependent and light independent

2) In a plant, which of these process (light dependent reactions, light independent reaction) can occur during the night?

a) Light-dependent

b)Light-independent

c)Both light dependent and light independent

d) Neither light dependent and light independent

3) Is cholorophyll the only molecule that absorbs light for photosynthesis?

a) yes

b) no

4)Does cellular respiration occur in all organism types?

a) yes

b) no

5) If no oxygen was provided from the outside should oxygen level increase or decrease as time goes on when in a plant is in the dark?

a) increase

b) decrease

6) As light intensity increases, what will happen to oxygen levels?

a)increase

b) decrease

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Related questions

Hi, I need help with this question. Please and thank you

20 Petri dishes of radish seeds are prepared as follows: each Petri dish receives with a disk of absorbent, but otherwise inert, filter paper and 5 mL of distilled water are added to each disk, then 2 grams of dry radish seeds are spread over each moist disk. 10 dishes are put in a dark cupboard and the other 10 are put on a sunny windowsill. The investigator checks the dishes daily and adds water equally as needed. Seeds in both treatments germinate within 2 days. At the end of 10 days, the plant material on each Petri plate is dried and weighed. The results are:
•Average sunny windowsill dry weight: 2.25 g
•Average dark cupboard dry weight: 1.75 g
**Question consists of three parts**

(1) Which of the following correctly lists the independent and dependent variables for this experiment?
A. Independent: Sun.
Dependent: Shade
B. Independent: Amount of light.
Dependent: Plant weight
C. Independent: Plant weight.
Dependent: Amount of water
D. Independent: Amount of water
Dependent: Plant weight

(2) What is the best explanation for why the dark grown seedling lost biomass?
A. The metabolism in the cells of the seeding in the dark increased to compensate for the lack of light energy
B. Cellular respiration needed for growth does not occur as efficiently in plants in the dark as in plants exposed to light
C. Cellular respiration in the cells of the seedlings consumed the starch and oils present in the seeds as sources of energy
D. The seeds in the dark decomposed

(3) What is the best explanation for why the light-grown seedlings gained biomass?
A. Cellular respiration converted chemical energy stored as starch into chemical bind in ATP
B. Photosynthesis converted sunlight to biomass
C. The seeds in the light absorbed oxygen and gained weight
D. Photosynthesis reduced carbon dioxide to glucose




5: chloroplast kept in the dark can continue to make sugar is provided with

A: NADPH, CO2, and ADP

B: CO2, and ATP

C: NADPH, ATP, and CO2

D: NADPH and ATP

E: water and ATP

7: C3 plants are more susceptible to photorespiration than either C4 or CAM plants. Why do most plants lack the C4 pathway??

A: Switching between C3, C4, and CAM photosynthesis is very difficult for most plants

B: ?Rubisco is more efficient in C3 plants when compared to rubisco of C4 and CAM plants

C: Most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night.

D; : Photorespiration is not a serious problem for most plants.?

E: There is an energetic cost to C4 and CAM pathways that only makes them advantageous in very hot and/or arid environments.?



8: In Engelmann's classic experiment, why were the oxygen-requiring bacteria clustered around the regions of Spirogyra algae that were bathed in red, blue, and violet light?

A; The bacteria were immobile and that is where Engelmann happened to place them

.?B; The most energy-rich wavelengths of light are found at the edges of visible and nonvisible light (ultra

violet and infrared)

C; Photosynthesis is most active in those wavelengths of light and thus more oxygen is consumed by the algae in those regions.

D: Photosynthesis is most active in those wavelengths of light and thus more oxygen is produced by the algae in those regions.?

E: : Chlorophyll is green and thus reflects green light.

9: In any experiment, changes to the dependent variable based on the manipulations of the independent variable are measured. When determining the action spectrum of a given plant, what is the independent variable and what is the dependent variable?

A: independent = rate of O2 release in photosynthesis; dependent = wavelength?

B: ?independent = absorption of light; dependent = wavelength

C: independent = wavelength; dependent = rate of O2 release in photosynthesis?

D: independent = wavelength; dependent = absorption of light?

E: independent = rate of O2 release in photosynthesis; dependent = absorption of light

11: In order to elucidate the Calvin cycle, Calvin and his colleagues used two-dimensional paper chromatography to analyze the presence of different molecules under different conditions. What did they conclude from the accumulation of RuBP when CO2 levels were low??

A: CO2 serves as a non-competitive inhibitor of rubisco.

B: RuBP is the last substrate to react in the Calvin cycle.

C: RuBP only reacts with CO2 when concentrations of ATP are low

D: RuBP is the first substrate to react with CO2

E: RuBP only reacts with CO2 in the sunlight


12: Why isn't oxygen produced by organisms that perform anoxygenic photosynthesis?

A; their membranes lack ATP synthase?

B; They use a different enzyme for the initial reactions of the calvin cycle

C: they use electrons donors other than water

D: their photosystem do not utilize the calvin cycle

E: their chorophyll contains an iron rather than magnesium

Chlorophyll is a pigment that absorbs specific wavelengths of light, and the absorption of that light leads to the passage of electrons to a higher energy state, where chemical energy can then be harvested from them. You would expect that a plant exposed to which color of light would produce the most photosynthesis?

green
orange
yellow
blue

Which color of light would you expect chlorophyll to absorb the least?

green
red
yellow
blue

Most plants are green because....

chlorophyll absorbs green light well
chlorophyll does not absorb green light well
chlorophyll reflects green light well
both of the last two answers are correct

Thinking about the gases involved in respiration and photosynthesis, during the day, a plant is producing____ from respiration and releasing_____ from photosynthesis. But at night, a plant is only producing_______ from respiration.(spell your answers out completely).

Plants perform cellular respiration to produce.......

ATP
NADPH
sugar
oxygen

Which of the following is true about plants and cellular respiration?

plants perform cellular respiration only during the night
plants perform cellular respiration only during the day
plants perform cellular respiration during the night and day
plants do not perform cellular respiration

Which of the following is true regarding plants and photosynthesis?

plants perform photosynthesis only during the night
plants perform photosynthesis only during the day
plants perform photosynthesis during the night and day
plants do not perform photosynthesis

Is it possible for this plant to consistently do more cellular respiration than photosynthesis?

yes, plants use excess ATP for growth
yes, but only during winter months
not today, but fossil records shows they did in the past
no, plants can't consume food faster than they make it

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