Biology Homework Help: Questions and Answers: Select all the true statements.
a) The nucleus of an animal cell contains the chromosomes but not the vacuoles.
b) Both the lysosomes and the chromosomes are outside the nucleus in an animal cell.
c) In an animal cell, vacuoles store sugar, and mitochondria break down the sugar to release energy.
d) In plant cells, vacuoles store sugar, and mitochondria break down the sugar to release energy.
Answer:
Let’s analysis each given statement one by one to determine which are true:
a) The nucleus of an animal cell contains the chromosomes but not the vacuoles.
- The nucleus houses the chromosomes (genetic material).
- Vacuoles are membrane-bound structures, but they are not located in the nucleus. They are present in the cytoplasm.
- Therefore, this statement is true.
b) Both the lysosomes and the chromosomes are outside the nucleus in an animal cell.
- Lysosomes are organelles that break down waste material, and they are located in the cytoplasm.
- Chromosomes, however, are located inside the nucleus, not outside.
- Therefore, this statement is false.
c) In an animal cell, vacuoles store sugar, and mitochondria break down the sugar to release energy.
- Vacuoles in animal cells are generally small and mainly store waste, ions, or water. They are not specialized for storing sugar.
- The mitochondria do break down sugars (via cellular respiration) to release energy, but the vacuoles do not typically store sugar.
- Therefore, this statement is false.
d) In plant cells, vacuoles store sugar, and mitochondria break down the sugar to release energy.
- In plant cells, vacuoles can store various materials, including sugars, though they mainly store water and nutrients.
- Mitochondria in plant cells, as in animal cells, break down sugars to release energy through cellular respiration.
- Therefore, this statement is true.
Final Answer
Based on the above analysis, the correct statements are:
a) The nucleus of an animal cell contains the chromosomes but not the vacuoles.
d) In plant cells, vacuoles store sugar, and mitochondria break down the sugar to release energy.
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