Can someone please check if my answers are correct?
21. The difference between autotroph and heterotroph is that
a. heterotrophs must get energy from sources other than the sun
b. heterotrophs can use chemical or light energy sources
c. heterotrophs do not obtain energy from autotrophs
d. all of the above
A?
25. Which of the following is NOT true for the cellular respiration process?
a. The total amount of ATP that a cell gains for each glucose molecule that enters glycolysis depends on the presence of carbon dioxide
b. Pyruvate produced during glycolysis enters a mitochondrian during the second stage of cellular respiration
c. The final electron acceptor in aerobic respiration is oxygen
d. Acetyl-CoA combines with a four-carbon molecule
A?
28. The structure of chromosomes is best explained as DNA
a. broken apart into separate genes
b. extended to form very long, thin molecules
c. wrapped tightly around associated proteins
d. coiled up into a ball
I'm stuck between C and D
29. A normal, healthy human offspring develops when
a. an X chromosome is donated by each parent
b. a change in the chromosome number occurs
c. the structure of a chromosome is changed by mutation
d. none of the above
D?
Thanks
-MC
29D is correct. I don't know about the others. We are still understaffed in the biology department.
Perhaps you can become our expert in a few years
21. To check if your answer is correct, you can review the definitions of autotroph and heterotroph.
An autotroph is an organism that can produce its own food using sunlight or inorganic compounds. They are able to convert energy from the sun into chemical energy that can be used for cellular processes.
A heterotroph, on the other hand, is an organism that cannot produce its own food and must rely on other organisms for energy. They obtain energy by consuming organic matter.
Looking at the answer choices, option A is correct. Heterotrophs must get energy from sources other than the sun, which differentiates them from autotrophs.
25. To check if your answer is correct, you need to review the cellular respiration process and the statements provided in the answer choices.
Cellular respiration is the process by which cells convert glucose and oxygen into ATP (adenosine triphosphate), the molecule used for energy in cells.
Looking at the answer choices, option A is incorrect. The total amount of ATP gained by a cell during cellular respiration does not depend on the presence of carbon dioxide. The presence of carbon dioxide is more closely related to the process of photosynthesis.
Therefore, the correct answer is option A.
28. To check if your answer is correct, you need to understand the structure of chromosomes.
Chromosomes are structures found in cells that carry genetic information in the form of DNA. They are made up of DNA molecules wrapped tightly around proteins called histones.
Looking at the answer choices, option C is correct. The structure of chromosomes is best explained as DNA wrapped tightly around associated proteins.
Therefore, the correct answer is option C.
29. To check if your answer is correct, you need to understand the concept of normal, healthy human offspring development.
In normal human reproduction, each parent contributes one sex chromosome to the offspring. Females have two X chromosomes, while males have one X and one Y chromosome.
Looking at the answer choices, option D is correct. A normal, healthy human offspring develops when an X chromosome is donated by each parent.
Therefore, the correct answer is option D.
Your answers for questions 21, 25, 28, and 29 are correct. Well done!