Bios 225 Chapter 4 - –Answer -Cell membrane -Chromosomes -Ribosome...

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Bios 225 Chapter 4

• All cells contain which of the following characteristics?

–Answer -Cell membrane -Chromosomes -Ribosomes

• Viruses are not considered living things because they only show signs of life when they are

inside a host BLANK.–Answer Cell

• The two major types of prokaryotic cells are BLANK and BLANK.

–Answer -bacteria -archaea

• Bacterial appendages can be divided into which two functional groups?

–Answer - -Provide motility -Provide attachment sites or channels

• Which appendage(s) provide motility?

–Answer -Flagellum -Axial filaments

• Which of the following is considered to be the basic unit of life?

–Answer Cell 1 / 2

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• Which of the following are characteristics inherent to life?

–Answer -Metabolism -Heredity -Growth and development

• Prokaryotic cells evolved on Earth about how many years ago?

–Answer 3.5 billion years

• Bacterial appendages that provide attachment sites or channels are called BLANK and

BLANK –Answer -fimbriae -pili

• Which of the following describes a single, polar flagellum?

–Answer Monotrichous

• Appendages that propel bacterial cells through an aqueous environment include BLANK

and axial filaments –Answer flagella

• The movement of an organism away from a chemical repellent is called BLANK

chemotaxis.–Answer negative

• Which of the following bacteria could exhibit phototaxis?

–Answer Photosynthetic bacteria

• Which of the following bores through the stomach lining and causes gastric ulcers?

–Answer Helicobacter pylori

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