Biology chapter 4----EXAM
Which of the following is a reactant in photsynthesis
H2O
What is the final electron acceptor in the electron transport chain in photosynthesis?
NADP+
What is the final electron acceptor in the electron transport chain in cellular respiration?
O2
Which molecule is produced as a waste product during the light dependent reactions?
O2
Which of the following directly provides energy needed for cell functions?
Oxygen picks up electrons
Which of the following is a true statement?
Chlorophyll absorbs light energy
What is a photosystem?
a group of molecules that absorb energy from sunlight
An electron transport chain is part of
both photosynthesis and cellular respiration
What molecule carries chemical energy that cells use for their functions?
ATP
The oxygen that plants release as waste comes from
H2O
Which of the following molecules found in the food we eat is most commonly broken down to make ATP?
carbohydrates
Which process is best represented by the following chemical equation? sugars + oxygen = carbon dioxide + water
cellular respiration
What term describes the process by which some organisms use chemical energy instead of light energy to make energy-storing molecule?
chemosynthesis
Which of the following responses is best represents the image shown by figure 4.2 below?
electron transport chain
In lactic acid fermentation, pyruvate changes to
ethanol and NAD+
Which process allows glycolysis to continue in the absence of oxygen?
fermentation
Chemosynthesis is a process through which some organisms use energy from chemicals in their environment to build sugars in the absence of
glucose
Before cellular respiration, glucose must be broken down by the process of
glycolysis
Which of the following is a heterotroph?
grass
Where in the cell does the Krebs Cycle take place?
in and across the inner membrane of the mitochondria
Where in the cell do light independent reactions happen?
in the stroma
Which of the following is a product of the Krebs cycle?
lactic acid
The water molecule labeled A in figure 4.1 are going to the thylakoids to take part in which process
light-dependent reactions
The part of cellular respiration that needs oxygen takes place inside the
mitochondria
Lactic acid fermentation occurs in
muscle cells
Where in the cell do light dependent reactions take place?
on the thykaloids
When cellular respiration is anaerobic it means that
oxygen is absent
Which process is best represented by the following chemical equation? 6CO2 + 6H2O ---> C6H1206 + 6O2
photosynthesis
What happens to the sugars that are made during photosynthesis?
they can be used to make food
Where in plant cells are the energy-absorbing molecules for photosynthesis located?
thykaloids
How many molecules of ATP are produced from the complete breakdown of one molecule of glucose during cellular respiration?
38 ATP molecules
What are the two important molecules produced during the light dependent reactions and used during the Calvin Cycle?
ATP and NADPH
What is the main function of the electrons shown in figure 4.2
provide energy to pump hydrogen ions
What is the function of the light dependent reaction?
to capture energy from sunlight and transfer it to energy-carrying molecules
In photosynthesis, what molecule provides the hydrogen atoms that eventually end up on glucose?
water
