BIOL100- Unit2-chapter7-Photosynthesis-LH

Which of the following equations represents photosynthesis?

In which of the following organelles does photosynthesis take place?

What connects the two photosystems in the light reactions? a) An electron transport chain b) Chlorophyll c) A thylakoid d) The Calvin cycle e) A chain of glucose molecules

Which of the following are photoautotrophs? A) bacteria found in the human digestive tract B) filamentous molds growing on bread C) corn stalks just before harvest D) deep-sea vent organisms that make organic molecules using hydrogen sulfide as an energy source

Chlorophyll is found in the __________ of chloroplasts. A) thylakoid membranes B) stroma C) thylakoid space D) outer membrane

In most green plants, chloroplasts are A) evenly distributed throughout the entire plant. B) concentrated in a portion of the leaf called the stroma. C) concentrated in a zone of leaf tissue called the mesophyll. D) evenly distributed throughout the leaf tissue.

What is the likely origin of chloroplasts? A) photosynthetic prokaryotes that lived inside eukaryotic cells B) prokaryotes with photosynthetic mitochondria C) eukaryotes that engulfed photosynthetic fungi D) mitochondria that had a mutation for photosynthesis

What is the name given to organisms that can make their own food and thus sustain themselves without consuming organic molecules derived from other organisms? A) chemotrophs B) heterotrophs C) synthesizers D) autotrophs

What two molecules are produced by the light reactions and used to power the Calvin cycle? A) C6H12O6 and O2 B) CO2 and O2 C) C6H12O6 and RuBP D) ATP and NADPH E) G3P and H2O

What provides electrons for the light reactions? A) Light B) O2 C) CO2 D) Water E) The Calvin cycle

What provides the carbon atoms that are incorporated into sugar molecules in the Calvin cycle? a) Sucrose (C12H22O11) b) G3P (C3H6O3) c) Carbon dioxide (CO2) d) Glucose (C6H12O6) e) RuP

What transports electrons from the light reactions to the Calvin cycle? a) NADH b) FADH2 c) NADPH d) An electron transport chain e) Chlorophyll

The light reactions take place in the _________ and the Calvin cycle takes place in the _________. A) inner membrane; outer membrane B) chloroplasts; mitochondria C) stroma; thylakoids D) mitochondria; chloroplasts E) thylakoids; stroma

CO2 enters and O2 escapes from a leaf via stroma.; stomata.; thylakoids.; or grana.

In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the____

Chloroplasts contain disklike membranous sacs arranged in stacks called

What is the source of energy that provides the boost for electrons during photosynthesis? a) cellular respiration. b) ATP. c) light. d) electromagnetism

The light reactions of photosynthesis include _____. a) NADPH recycling. b) the stoma. c) the Calvin cycle. d) reduction of NADP+. e) reduction of CO2.

The conversion of NADP+ to NADPH occurs with the assistance of _____. a) electrons from carbon dioxide and energy from ATP. b) electrons from water and energy from ATP. c) electrons from carbon dioxide and energy from sunlight. d) electrons from water and energy from sunlight.

The light reactions occur in the ________, while the Calvin cycle occurs in the ________. a) thylakoid membranes . . . stroma. b) cytoplasm . . . thylakoid membrane. c) stroma . . . thylakoid membranes. d) stroma . . . nucleus

Which of the following are produced during the light reactions of photosynthesis? a) ADP, NADP+, O2. b) glucose, ADP, NADP+, CO2. c) glucose, ADP, NADP+. d) ATP, NADPH, O2

Which of the following are produced during the Calvin cycle? a) ATP, NADPH, CO2. b) glucose, ADP, NADP+, CO2. c) glucose, ADP, NADP+. d) ATP, NADPH, O2

Which of the following colors of light are useful during the process of photosynthesis? Hints a) green, orange, and red. b) orange, red, and violet. c) blue, red, and violet. d) blue, green, and orange

Sunlight is a type of ________ energy. Check all that apply a) electromagnetic b) nuclear. c) potential. d) kinetic

Which of the following colors contributes the least energy to photosynthesis? a) red. b) orange. c) green. d) blue

A packet of light energy is called a a) quantum. b) photon. c) phaser. d) pigment.

The primary function of light absorption by photosystems I and II is to produce _____. a) heat. b) a free, energized electron. c) oxygen. d) fluorescence

How do the reaction centers of photosystem I and II differ? a) Each preferentially absorbs slightly different wavelengths of light. b) Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II. c) Photosystem II does not transfer electrons from photons. d) Photosystem I functions first in the sequence of steps...

Clusters of light-gathering pigments in a photosystem a) pass energy to the reaction center. b) absorb electrons. c) are found in the roots of plants. d) break down H2O.

The electrons lost from the reaction center of photosystem II are replaced by electrons from a) ATP. b) H2O- Water. c) CO2. d) photosystem I.

The chloroplast ATP synthase a) helps transport H+ against the concentration gradient. b) is a nucleic acid complex. c) is found in the stroma. d) couples the flow of H+ to the phosphorylation of ADP.

In simple summary form, the input of the Calvin cycle for every product is _____, and the output is _____ used for glucose synthesis. a) NADP+ ... NADPH. b) 6 CO2 ... glucose. c) ADP ... ATP. d) 3 CO2 ... a three-carbon molecule

How many turns of the Calvin cycle are required to produce one molecule of glucose? one? six? two? or three?

Photosynthetic organisms derive their carbon from a) hydrocarbons. b) methane. c) carbon dioxide. d) carbon monoxide.

The Calvin cycle constructs ________, an energy-rich molecule that a plant cell can then use to make glucose or other organic molecules. a) carbon dioxide. b) NADH. c) ATP. d) G3P

You're conducting an experiment... Small aquatic plants are placed into three containers of water mixed with carbon dioxide and indicator solution. Container A is placed under normal sunlight, B under green light, and C under red light. The containers are observed for a 24-hour period. Carbon dioxide absorption is an appropriate indicator of photosynthesis because a) CO2 is needed to complete the light reactions. b) plants produce oxygen gas by splitting CO2. c) CO2 is needed to produce sugars in the Calvin cycle. d) the energy in CO2 is used to produce ATP and NADPH.

Plants use sugars as a) a fuel for cellular respiration and a starting material for making other organic molecules. b) a fuel for photosynthesis. c) a source of electrons for chemiosmosis. d) a starting material for the Calvin cycle.

You could distinguish a granum from an inner mitochondrial membrane because the granum, but not the inner mitochondrial membrane, would _____. a) function in energy transformation. b) contain protein but not lipids c) have photosynthetic pigments. d) be inside a mitochondrion

Cellular respiration and photosynthesis are similar in that both involve _____. a) water splitting. b) the release of O2 into the atmosphere. c) the production of sugars. d) oxidation-reduction (redox) reactions

When chloroplast pigments absorb light, _____. a) they become reduced. b) their electrons become excited. c) they lose potential energy. d) the Calvin cycle is triggered

Light reactions are located in the thylakoid membrane because _____. a) the enzymes involved require a lipid bound to their active site. b) chemiosmosis can occur across the thylakoid membrane. c) the membrane brings chlorophyll closer to the light. d) the membrane functions as a mitochondrial membrane but at night.

Although the reactions of the Calvin cycle are not directly dependent on light, they usually do not occur at night. Why? a) It is often too cold at night for these reactions to take place. b) The Calvin cycle depends on products of the light reactions. c) Plants usually open their stomata at night. d) Carbon dioxide concentrations decrease at night.

NADP+ is required for photosynthesis because it _____. a) forms NADPH to be used in the Calvin cycle. b) helps produce ATP from the light reactions. c) absorbs light energy. d) forms part of photosystem II

You have a large, healthy philodendron that you carelessly leave in total darkness while you are away on vacation. You are surprised to find that it is still alive when you return. What has the plant been using for an energy source while in the dark? a) Even though the plant received no visible light, it was able to use the shortwave part of the electromagnetic spectrum (gamma rays and X-rays) to carry out photosynthesis. b) While it did have access to light before you left, the plant stored energy in the form of sugars or starch, and it was able to derive energy from those during your vacation. c) Even though it cannot carry out the light reactions, the plant can still produce sugars because the Calvin cycle does not require light. d) When light energy is not available, plants can derive energy from inorganic molecules.