Photosynthesis: The Light-dependent Reactions

27 Questions | By Mpridemore14 | Updated: Mar 15, 2022 | Attempts: 121

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1.

What metabolic reaction releases energy?
- A.
  
  Exothermic
- B.
  
  Endothermic
- C.
  
  Catalyst
2.

What is the substance that increases the rate of areaction that would otherwise be too slow?
- A.
  
  Coupled reaction
- B.
  
  Catalyst
- C.
  
  Enzyme
3.

What is the region on the enzyme where the reaction takes place?
- A.
  
  Catalyst
- B.
  
  Reactive site
- C.
  
  Active site
4.

What is it called when enzymes link reactions that release energy to reactions that require energy?
- A.
  
  Exothermic reaciton
- B.
  
  Oxidation
- C.
  
  Coupled reaction
5.

Each step in photosynthesis and respiration is mediated by what?
- A.
  
  Catalyse
- B.
  
  Oxygenase
- C.
  
  Enzymes
6.

Check which are characteristics of oxidation
- A.
  
  Gain of electrons
- B.
  
  More C-H bonds
- C.
  
  More C-O bonds
- D.
  
  Loss of electrons
7.

When an electron is removed, a proton may follow, with a result that a hydrogen ion is often (blank) during oxidation and (blank) during reduction.
- A.
  
  Added; removed
- B.
  
  Removed; added
- C.
  
  Added; added
8.

Carbon dioxide diffuses through the stomatal pores and goes into solution in the thin film of water on the outside walls of the mesophyll cells.
- A.
  
  True
- B.
  
  False
9.

What is the source of electrons used in photosynthesis?
- A.
  
  Carbon dioxide
- B.
  
  Water
- C.
  
  Glucose
10.

What is the colorless fluid matrix which contains enzymes in the chloroplast?
- A.
  
  Grana
- B.
  
  Thylakoids
- C.
  
  Stroma
11.

The grana are the double-membrane disks in the chloroplast
- A.
  
  True
- B.
  
  False
12.

The thylakoid membrane contains green chlorophyll and other light capturing pigments.
- A.
  
  True
- B.
  
  False
13.

About 40% of the radiant energy plants receive from the sun is in the form of UV light
- A.
  
  True
- B.
  
  False
14.

Shorter wavelengths have higher energy and longer wavelenghts have less energy
- A.
  
  True
- B.
  
  False
15.

What color has the shortest wavelengh; which one has the longest?
- A.
  
  Violet; red
- B.
  
  Red; violet
- C.
  
  Blue; green
16.

In 1882, who demonstrated that oxygen production is diectly related to the type of light that the chlorophyll absorbs?
- A.
  
  Gregory V. Medel
- B.
  
  George Chikealo
- C.
  
  T.W. Engelmann
- D.
  
  Henry W. Goddard
17.

What does each cholophyll molecule contain?
- A.
  
  A long lipid tail which is anchored into the interior of a thylacoid membrane
- B.
  
  A phosphate group
- C.
  
  One atom of magnesium
- D.
  
  A Hydroxyl group
18.

Chlorophyll a reflects bluish green light
- A.
  
  True
- B.
  
  False
19.

There is 3x more chlorophyll b than a in a chlorolplast.
- A.
  
  True
- B.
  
  False
20.

What is the yellowish-orange pigment found in all plants?
- A.
  
  Chlorophyll a
- B.
  
  Chlorophlyll b
- C.
  
  Carotenoids
21.

The maximum absorption of Carotenouds is in the blue and red wavelength
- A.
  
  True
- B.
  
  False
22.

Light dependent photosynthesis is a (blank) pathway
- A.
  
  Cyclic
- B.
  
  Non-cyclic
23.

For both photosystems involved in the non-cyclic pathway, their individual units are made up of:
- A.
  
  Mostly chlorophyll b
- B.
  
  Mostly chlorophyll a
- C.
  
  Much smaller amounts of chlorophyll b and carotenoid pigments
- D.
  
  Much larger amounts of chlorophyll b and carotenoid pigments
- E.
  
  A reaction-center molecule of chlorophyll a
24.

The reaction-center molecule is the only molecule in the unit where an electron can be raised to an excited state.
- A.
  
  True
- B.
  
  False
25.

The other pigments in the unit are called (blank) because they gather light energy and pass that energy on to the reaction-molecule.
- A.
  
  Reacrtion-center
- B.
  
  Antenna pigments
- C.
  
  UV pigments