Midterm Review #3

The diagram below represents what occurred when an onion cell and a red blood cell were placed in distilled water. The best explanation for why the onion cells do not burst, while red blood cells often do, is that

• the red blood cells have only a cell membrane, which does not protect them from bursting
• the onion cells do not have a cell wall that could protect them from bursting
• the onion cells have a cell membrane, which can protect them from bursting
• the red blood cells have a cell wall, which does not protect them from bursting

After two hours, the color of the liquid in the beaker did not change. This shows that

• glucose moved from the artificial cell into the beaker
• starch did not pass out of the artificial cell
• starch was digested to glucose in the artificial cell
• glucose molecules combined to produce starch in the artificial cell

Identify the color of the contents of the artificial cell after two hours.

• Amber brown
• Blue/black
• Clear
• White

A model cell setup is represented in the "Initial State" diagram below. Which diagram indicates the area where each of these substances would be located after 20 minutes?

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• 
• 
• 

This laboratory setup would most likely be used to demonstrate

• carbohydrate synthesis
• active transport
• diffusion
• dehydration

What is one relationship between temperature and the rate of bubbles released in yeast, that is supported by the table?

• The higher the temperature, the less bubbles released.
• There is no relationship between temperature and number of bubbles released.
• The lower the temperature, the less bubbles released.
• The lower the temperature, the more bubbles released.

A student wants to bake the biggest loaf of bread in the local baking contest. Each contestant must use the same amounts of flour, sugar, and yeast, but is allowed to vary the type of sugar. Yeast is a microorganism that carries out cellular respiration, which produces carbon dioxide, making the bread rise. The student designs an experiment using the setup below to determine which sugar source (glucose, sucrose, or fructose) will cause the yeast to produce the most carbon dioxide and therefore,the biggest loaf of bread. What is a possible hypothesis for this experiment?

• If glucose is the sugar that is used, it will produce the most carbon dioxide.
• Which sugar will produce the most carbon dioxide?
• Glucose and fructose both produced a balloon circumference of 10 cm.
• The dependent variable is the amount of carbon dioxide produced.

A student wants to bake the biggest loaf of bread in the local baking contest. Each contestant must use the same amounts of flour, sugar, and yeast, but is allowed to vary the type of sugar. Yeast is a microorganism that carries out cellular respiration, which produces carbon dioxide, making the bread rise. The student designs an experiment using the setup below to determine which sugar source(glucose, sucrose, or fructose) will cause the yeast to produce the most carbon dioxide and therefore,the biggest loaf of bread. What group is missing from this experimental setup?

• An experimental group with double the amount of glucose.
• An experimental group with glucose, sucrose, and fructose.
• A control group with glucose, sucrose, and fructose.
• A control group with just water and yeast solution.

Part of a laboratory procedure is shown in the diagram below. This setup would most likely be involved in a procedure to

• stain specimens while making a wet mount
• test for the presence of glucose using an indicator
• separate pigments in a mixture
• determine the pH of solution

The laboratory setups represented below were used to investigate the effect of temperature on cellular respiration in yeast (a single celled organism). Identify the gas that would be produced by the process taking place in both laboratory setups.

• Oxygen
• Carbon Dioxide
• Nitrogen
• Helium