PHOTOSYNTHESIS: A CLOSER LOOK
The chemical energy stored in ATP during photosynthesis is released during the dark phase to:
produce a carbohydrate from CO ₂
a food made up of carbon, hydrogen, oxygen, nitrogen
protein
the putting together of protein molecules from amino acids
protein synthesis
Enzymes are:
proteins
the high energy chemical compound that provides energy
ATP
For maximum photosynthesis, increased light intensity has greater effect than increased leaf surface area.
False
Proteins are the building blocks of amino acids.
False
Proteins of one plant are like proteins of other plants, but animal proteins are unlike each other and plant proteins.
False
Protoplasm consists of numerous combinations of 22 proteins.
False
Ribosomes are only found in plant cells.
False
Proteins are made by:
Ribosomes in plants and animals
A green house may be used to control temperature and carbon dioxide.
True
A tiny body within plant cells, the chloroplast, is the power generator for life on earth.
True
Animals and humans cannot live without protein in their diet.
True
Carbon dioxide levels above normal will increase plant growth if other factors are adequate.
True
Enzymes are an example of proteins.
True
Some of the most complex organic molecules are those of proteins.
True
the building blocks of proteins
amino acid
The building blocks of proteins are ☐.
amino acids
Since carbon as an atmospheric gas is locked into a food molecule, it is termed carbon dioxide fixation. Another name for this process of photosynthesis is the ☐.
dark reaction
provides energy storage and structure for life
fat
Each protein molecule is made of at least ☐ amino acid units.
fifty
Hill is known for working out reactions taking place during the ☐ of photosynthesis.
light reaction
The twenty two amino acids are capable of producing _______________.
millions of different proteins
All proteins contain ☐, in addition to carbon, hydrogen, and oxygen.
nitrogen
essential to aerobic respiration
oxygen
Van Niel's theory, later shown to be correct, claimed that the oxygen produced by photosynthesis comes from the ☐.
splitting of the water molecule
The oxygen which is released into the air by a plant originates from:
splitting of water molecules
the tiny pores or leaf openings appearing between guard cells
stomate
Photosynthesis continues to increase with temperature when _____.
temperature increases within normal limits and carbon dioxide is supplied
Match the associations with the "light" and "dark" phases of photosynthesis: solar energy ☐. CO₂ intake ☐. release of energy ☐. storage of energy ☐. release of O2 ☐. release of water ☐. ATP ☐. forms carbohydrates ☐.
• light • dark • dark • light • light • dark • light • dark
Proteins may be identified separately from fats and carbohydrates by the presence of certain elements. Choose the elements that qualify.
• sulfur • iron • phosphorus • zinc • nitrogen
