Science Biology Chapter 7 Test

2.

is the organelle that is responsible for transforming energy.

Explanation
The mitochondrion is responsible for transforming energy in the cell. It is often referred to as the "powerhouse" of the cell because it produces the majority of the cell's energy in the form of adenosine triphosphate (ATP) through cellular respiration. This organelle contains its own DNA and is involved in various metabolic processes, including the citric acid cycle and oxidative phosphorylation. The mitochondrion has a double membrane, with the inner membrane forming folds called cristae that increase its surface area for ATP production. Overall, the mitochondrion plays a crucial role in energy production and metabolism in eukaryotic cells.

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2

3.

The nucleolus is located outside of the nucleus.

True
False

Correct Answer

A. False

Explanation

The nucleolus is actually located inside the nucleus. It is a small, dense region within the nucleus where ribosomes are synthesized and assembled. The nucleolus plays a crucial role in protein synthesis and is involved in the production of ribosomal RNA (rRNA) and the assembly of ribosomes. Therefore, the statement that the nucleolus is located outside of the nucleus is incorrect.

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4.

When looking through a microscope, if you are viewing something through high power (40x) what knob do you use?

Coarse adjustment knob only
The fine adjustment knob
Diaphragm

Correct Answer

A. The fine adjustment knob

Explanation

The fine adjustment knob is used when viewing something through high power (40x) on a microscope. This knob allows for small, precise adjustments to the focus of the specimen, ensuring a clear and detailed image. The coarse adjustment knob is used for larger, initial focusing adjustments, while the diaphragm controls the amount of light entering the microscope.

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5.

Which of the following course of events is in the correct order starting with the earliest event and ending with the latest event listed in the group?

Anton van Leeuwenhoek invented the light microscope; people believed diseases were caused by curses; bacteria were discovered.
Theodor Schwann made observations on animals; Robert Hooke observed cork cells; the light microscope was invented.
People believed diseases were caused by curses; microscopes were invented; bacteria were discovered.
STM's were invented; bacteria were discovered; Leeuwenhoek invented the light microscope.

Correct Answer

A. People believed diseases were caused by curses; microscopes were invented; bacteria were discovered.

Explanation

The correct order of events is as follows: People believed diseases were caused by curses, microscopes were invented, and bacteria were discovered. This sequence makes logical sense because initially, people attributed diseases to supernatural causes (curses) before the invention of microscopes. With the invention of microscopes, scientists were able to observe and discover bacteria, leading to a better understanding of the causes of diseases.

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6.

Once proteins are made, where do they go?

Golgi Apparatus
Nucleus
Lysosome

Correct Answer

A. Golgi Apparatus

Explanation

Proteins are synthesized in the cytoplasm of a cell by ribosomes. Once synthesized, they are transported to the Golgi Apparatus, which is responsible for modifying, sorting, and packaging proteins for transport to their final destination. The Golgi Apparatus adds various molecules to the proteins, such as carbohydrates, lipids, or other proteins, to form functional complexes. It then packages the modified proteins into vesicles for transport to their specific locations within the cell or for secretion outside the cell. Therefore, the Golgi Apparatus is where proteins go after they are made.

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7.

What organelle traps light energy and converts it to chemical energy?

Mitochondrion
Nucleus
Chloroplast

Correct Answer

A. Chloroplast

Explanation

Chloroplasts are the organelles responsible for photosynthesis in plant cells. They contain chlorophyll, a pigment that absorbs light energy. This light energy is then converted into chemical energy in the form of glucose through a series of chemical reactions. Therefore, the correct answer is chloroplast.

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8.

is the organelle that is the control center of the cell.

Correct Answer
nucleus

Explanation
The nucleus is the organelle that is the control center of the cell. It contains the cell's genetic material, including DNA, which carries the instructions for the cell's functions and characteristics. The nucleus regulates the cell's activities by controlling gene expression and directing protein synthesis. It also plays a crucial role in cell division, as it coordinates the replication and distribution of DNA during cell replication. Overall, the nucleus is essential for maintaining the cell's structure, function, and genetic integrity.

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9.

There are layers in a phospholipid.

Correct Answer
two
2

Explanation
A phospholipid consists of two layers, known as a bilayer. Each layer is made up of two fatty acid chains and a phosphate group. This arrangement allows the hydrophobic fatty acid chains to face inward, away from water, while the hydrophilic phosphate groups face outward, interacting with water. This dual-layer structure is essential for the formation of cell membranes and plays a crucial role in maintaining cell integrity and regulating the movement of molecules in and out of the cell.

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10.

If you observed a cell under a microscope and noticed that it contained a plasma membrane, cell wall, and ribosomes, but none of the other organelles, what could you conclude?

It is a prokaryotic cell.
It is a dinosaur.
It is a eukaryotic cell.

Correct Answer

A. It is a prokaryotic cell.

Explanation

Based on the information provided, if a cell contains a plasma membrane, cell wall, and ribosomes but none of the other organelles, it can be concluded that it is a prokaryotic cell. Prokaryotic cells are simpler in structure compared to eukaryotic cells and lack membrane-bound organelles such as a nucleus, mitochondria, or endoplasmic reticulum. The presence of a cell wall and ribosomes further supports the conclusion that it is a prokaryotic cell.

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Science Biology Chapter 7 Test

If an organism does not have membrane-bound organelles, what is it called?

Quiz Preview

is the organelle that is responsible for transforming energy.

The nucleolus is located outside of the nucleus.

When looking through a microscope, if you are viewing something through high power (40x) what knob do you use?

Which of the following course of events is in the correct order starting with the earliest event and ending with the latest event listed in the group?

Once proteins are made, where do they go?

What organelle traps light energy and converts it to chemical energy?

is the organelle that is the control center of the cell.

There are layers in a phospholipid.

If you observed a cell under a microscope and noticed that it contained a plasma membrane, cell wall, and ribosomes, but none of the other organelles, what could you conclude?