4. correct
12. see Sev's post. I would also add that they absorb red and blue light.
14. What energy-carrying molecules do you know about?
17. Where does a plant get the atoms of Carbon, Oxygen, and Hydrogen to build sugar (C6H12O6)?
The question asks about where the atoms in sugar come from. Under normal circumstances, atoms do not come from energy. For a lot of these questions, you know the answers but you just aren't writing things that answer the question.
18. During the Calvin Cycle, what is the source of energy to bond the atoms of sugar together?
This question is asking for a source of energy. It is not asking about where the carbon, oxygen and hydrogen atoms in sugar come from.
22. Correct
23.
When do cells do fermentation?Your original answer was correct.
What are the possible end products of fermentation?Two types of fermentation reactions occur. Lactic acid fermentation occurs in mamalian muscle cells and produces lactic acid as an end product. Ethanolic fermentation occurs in various microbes and produces ethanol as an end product.
What type of cells can do this process?Your original answer was correct.
As a general hint, you should try to write out the answers in your own words instead of just copying sentences out of a book. When you read something, memorize the concepts and not the phrase that spells out the concept. Also, when answering these questions, it may be helpful to write out your answers as complete sentences and make sure that these sentences make sense if you read them out loud. Finally, when you read a question, take a moment to figure out what the question is really asking for. I think you know the answer to these questions, but you are mainly having trouble connecting the right concepts with the right questions (if that makes sense at all).