BIOLOGY 110 Exam 3 Practice Test
The efficiency of energy transfer between trophic levels is about
10%
Which of the following are outputs of the dark reactions in photosynthesis?
ADP + Pi and NADP+
Which of the following is true concerning the light reactions of photosynthesis?
ATP and NADPH are produced
What best describes the part of the ATP molecule labeled 'A' above?
a nitrogenous base
What best describes the part of the ATP molecule labeled 'C' above?
a phosphate group
Sulfur is a component of which of the following biological molecules?
amino acids
The hydrolysis of ATP into ADP + Pi is coupled to
endergonic reactions
Which of the following is true concerning the dark reactions of photosynthesis?
glucose is produced
Lowering the activation energy of a reaction will
increase the rate of the reaction
The second law of thermodynamics states that
no energy transformation is 100% efficient, usable energy in the universe is constantly decreasing, and unusable energy in the universe (entropy) is continuously increasing
Which of the following is true concerning the diagram above?
photoautotrophs may participate in processes 1 and 2
In the figure above, what term best describes process #1 in the cycling of carbon, hydrogen, and oxygen?
photosynthesis
Note the chemical reactions below. Which of the following is true?
reaction #1 liberates energy that could be used to do work and it is exergonic
The most significant source of nitrogen for living things is which of the following?
recycling of organic nitrogen by decomposers
Organisms that consume herbivores are an example of
secondary consumers
Which of the following is true of endergonic reactions?
the free energy of the products is much greater than the free energy of the reactants
The hydrolysis of ATP into ADP + Pi is an example of a reaction in which
the free energy of the products is much less than the free energy of the reactants
Energy released from the electron transport chain in the light reactions of photosynthesis is used for
the production of ATP
What best describes exergonic reactions?
they are spontaneous
What is true of photoautotrophs?
they get their carbon from CO2 and their energy from light
Which of the following are components of an ecosystem?
water, producers, and light
