Biology release test questions 1-20

Which molecule in plant cells first captures the radiant energy from sunlight?

Chlorophyll

Is surrounded by a rigid coat of cellulose Has DNA a well defined nuclear membrane Contains mitochondria chloroplasts -which of these best completes this concept map?

A plant cell

There are many different enzymes located in the cytoplasm of a single cell. How is a specific enzyme able to catalyze a specific reaction?

An enzyme binds to a specific substrate (reactant) for the reaction catalyzed.

Some snake venoms are harmful because they contain enzymes that destroy blood cells or tissues. The damage caused by such a snakebite could best be slowed by

Applying ice to the bite area

Maltose can be broken down into glucose molecules by the enzyme maltase. Which of the following would slow the reaction rate?

Diluting with water

Which cellular organelle is responsible for packaging the proteins that the cell secretes?

Golgi apparatus

Eukaryotic cells are differentiated from prokaryotic cells because eukaryotic cells

Have nuclei

In most stable freshwater environments, 5 populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce. Based on these observations, a researcher suggests that male Daphnia develop in response to unfavorable environmental conditions. This is an example of a

Hypothesis

How did this evidence affect the work of Watson and Crick?

It was used to determine the physical structure of DNA

The first stage of photosynthesis in a chloroplast is

Light dependent

What causes tomatoes to ripen much more slowly in a refrigerator than they do if left on a table at room temperature?

Low temperatures reduce the action of ripening enzymes

A computer model of cellular mitosis can simulate the aspects of cellular division quite well. However, microscopic observation of actual cellular mitosis can improve understanding because actual observations

May reveal greater unknown complexities

The cell membrane of the red blood cell 13 will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other substances are blocked from entering, this membrane is called

Semi-permeable

Which information was most important to the development of genetic engineering techniques?

The structure of a DNA molecule

Which of the following best describes the use of population models in biology?

They can help predict outcomes

The plasma membrane of a cell consists of

Two layers of lipids organized with the nonpolar tails forming the interior of the membrane

Two students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. Which of the following could be an unavoidable source of experimental error?

Variation in the strawberry plants

When the Mount St. Helens volcano erupted, the blast covered much of the surrounding area with ash. Based on the diagram above, which list shows the sequence of secondary succession that followed that eruption?

Z, X, Y, W

A student filled two Petri dishes with a clear cornstarch gel, then marked the letter "X" invisibly onto the gel in Petri dish 1 with a damp cotton swab. He then placed saliva from his mouth onto a second cotton swab and used that swab to mark the letter "X" invisibly onto the gel in Petri dish2. Fifteen minutes later, he rinsed both Petri dishes with a dilute solution of iodine to indicate the presence of starch. The surface of Petri dish 1 turned completely blue, indicating starch. Most of the surface of Petri dish 2 was blue, except the letter "X" was clear, as shown above. The most probable explanation of the clear "X" is that

a chemical in the saliva broke down the starch in the gel.

After a volcanic eruption has covered an area with lava, which of the following is the most likely order of succession in the repopulation of the area?

lichens → grasses → shrubs → trees