Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G₁ is a stage just after the cell has divided, and G₂ is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles.
-Which of these conclusions cannot reasonably be drawn from the graph?
A)Protein production occurs throughout the cell cycle.
B)Increase in ribosomal activity occurs as a cell prepares to divide.
C)Cells export a large amount of protein following cell division.
D)There is always a supply of amino acids in the cell.

Question

Much of the intracellular structure of a eukaryote cell is involved in protein synthesis. The figure shows the amounts of protein in cells at different parts of the cell cycle between two cell divisions. G₁ is a stage just after the cell has divided, and G₂ is the stage just before the cell divides again. S is a stage when the cell is synthesizing material such as DNA, mitochondria, and other organelles.
-Which of these conclusions cannot reasonably be drawn from the graph?
A)Protein production occurs throughout the cell cycle. 
B)Increase in ribosomal activity occurs as a cell prepares to divide. 
C)Cells export a large amount of protein following cell division. 
D)There is always a supply of amino acids in the cell.

Quizplus · Accepted Answer

The graph does not provide any information on the export of proteins following cell division, so it cannot be reasonably concluded from the data. However, the other three choices are all supported by the graph. The graph shows a consistent level of protein production throughout the cell cycle, with a slight increase in protein synthesis during the preparation for cell division (G₂ phase). This makes sense, as the cell needs to produce more proteins as it prepares to divide. The graph also does not contradict the idea that there is always a supply of amino acids in the cell, as the graph only shows protein amounts, not amino acid amounts.

Much of the Intracellular Structure of a Eukaryote Cell Is