Chapter 7 Practice Test

Mitochondria and chloroplasts are different from most organelles because

• they are extremely small
• they don’t have a specific function
• they have two membranes
• they can travel in and out of a cell

Where do biologists think mitochondria and chloroplasts came from?

• They evolved from the nucleus to become the powerhouse of the cell
• Since they have two membranes, they must have divided twice
• Ancient eukaryotes engulfed simple cells and they survived to reproduce
• An animal cell ate a plant cell a long time ago and the parts survived

Which of the following is the correct levels of organization, starting with the cell?

• cell, organ, tissue, organism, organ system
• cell, tissue, organ system, organism, organ
• cell, tissue, organ, organ system, organism
• cell, organ system, organ, organism, tissue

If you drink an isotonic beverage, which of the following could happen to your cell size?

• your cells will shrivel in your stomach
• your cells will swell up really big in your stomach
• you will instantly die as they explode
• nothing will happen

In eukaryotic cells, chromosomes carrying genetic information are found in the ____, while in prokaryotic cells they are found in the _____.

• Ribosomes, nucleus
• Cytoplasm, nucleus
• Nucleus, cytoplasm
• Nucleus, cell membrane

The term ______ refers to the relatively constant internal physical and chemical state of a living cell.

• cell
• heterozygous
• unicellular
• homeostasis

Why is it more important for the cells of single-celled organisms to do homeostasis then the cells of multicellular organisms?

• They only have one cell, so if that one cell gets damaged, doesn’t function right, or dies, the organisms dies.
• They only have a few cells, so if they get damaged, don’t function right, or die, the organisms dies.
• In a single-celled organism, homeostasis is required for survival, where in a multicellular organism, it isn't required for survival
• It isn't more important

Looking at the picture, note which cell (1 or 2) is the animal cell and which is the plant cell.

• 1 is the plant cell, because it doesn't have a nucleus (e). No plant cells have a nucleus in them.
• 1 is the animal cell, because it has a cell wall (b) like animals do but not a golgi apparatus (j)
• 2 is the plant cell, because it has a cell wall (b), a chloroplast (f), and a large vacuole (d) that animals don't have
• 2 is the animal cell, because it has a mitochondria (h), a cell membrane (a), and endoplasmic reticulum, which plants don't have

What is the function of nuclear pores?

• to produce ribosomes
• to allow the endoplasmic reticulum to send materials outside of the cell
• to allow materials in and out of the nucleus
• to make more parts of the cell membrane when it gets broken

What do vacuoles have to do with plants wilting?

• When a vacuole dies, the plant dies too and wilts
• When a vacuole is empty, the plant wilts
• When a vacuole is full, the plant wilts
• When a vacuole doesn't make enough energy, the plant wilts