Chapter 14: Activity Questions

b. Mitochondria

After a long period of coevolution, the aerobic bacterium consumed bu the predatory cell became the cellular organelle known as the: a. endoplasmic reticulum b. mitochondrion c. chloroplasts d. centriole e. nucleus

d. Chloroplast

After a long period of coevolution, the photosynthetic bacterium consumed by the predatory cell became the cellular organelle known as the: a. Endoplasmic reticulum. b. Mitochondrion. c. Centriole. d. Chloroplasts. e. Nucleus.

c. viruses

Based on the chemical make-up of the first self-replicating molecule, it most closely resembles the structure of certain types of: a. plant cells b. bacteria c. viruses d. animal cells

b. provirus

Double-stranded viral DNA is incorporated into a host cell as a ___________. a. promoter b. provirus c. transposon d. ion e. homeoboxes

a. Ribosomes

In a bacterium, where are proteins synthesized? a. Ribosomes b. Nucleus c. Peroxisome d. Nucleoid Region e. Capsule

c. 4 billion years ago

Self-replicating molecules are thought to have appeared about: a. 40 million years ago b. 1 billion years ago c. 4 billion years ago d. 10 million years ago

d. D

The DNA-containing region of this bacterial cell is indicated by the letter _________. a. A b. B c. C d. D e. E

a. Plasma membrane

The ______________ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell. a. Plasma membrane b. Nucleoid region c. Ribosomes d. Finbriae e. Cell wall

d. the predatory cell is unable to digest the bacteria

The bacteria initially persist in the predatory cell because: a. the predator was storing the bacterium temporarily, intending to digest them later. b. the predatory cell is unable to excrete them. c. the predator knows the bacteria will be useful later on. d. the predatory cell is unable to digest the bacteria.

b. single-stranded DNA

The genetic material of HIV consists of _____________. a. single-stranded DNA b. single-stranded RNA c. double stranded DNA d. double stranded RNA e. now

b. in hot-springs

The most likely location of where ribosomes developed is: a. in lakes b. in hot-springs c. in the atmosphere d. on land

c. C

The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter __________. a. A b. B c. C d. D e. E

d. 256

There are four bacteria in an egg salad that is left out at room temperature. After two hours, how many bacteria will be in the egg salad? a. 32 b. 8 c. 2048 d. 256

True

True or False: Bacteria reproduced by an sexual process is which one parent cell gives rise to identical daughter cells. True or False

c. Reverse transcriptase

What enzyme is responsible for the process seen here? a. RNA polymerase b. DNA polymerase c. Reverse transcriptase d. Endonuclease e. DNA ligase

a. Protection

What is the function of a bacterium's capsule? a. Protection b. Propulsions c. DNA storage d. Protein synthesis

e. It catalyzes the formation of DNA from an RNA template.

What is the function of reverse transcriptase? a. It catalyzes the formation of a polypeptide from an RNA template. b. It catalyzes the formation of DNA from a polypeptide template. c. It catalyzes the formation of RNA from a polypeptide template. d. It catalyzes the formation of RNA from a DNA template. e. It catalyzes the formation of DNA from an RNA template.

d. Host cell membrane

What is the source of a viral envelope? a. Host cell DNA b. Prophages c. Proviruses d. Host cell membrane e. Viral glycoproteins

c. Cell wall

What name is given to the rigid structures, found outside the plasma membrane, that surrounds and supports the bacterial cell? a. Capsule b. Fimbriae c. Cell wall d. Flagella e. Nucleoid region

d. nucleoid region

Where is a bacterial cell's DNA found? a. Ribosomes b. Nucleus c. Peroxisome d. Nucleoid region e. Capsule

a. A

Which of these binds to receptor molecules on the host cell membrane? a. A b. B c. C d. D e. E

c. C

Which of these is reverse transcriptase? a. A b. B c. C d. D e. E

e. E

Which of these is the viral genome? a. A b. B c. C d. D e. E

a. Capsule

Which structure helps bacteria to attach within the tissues that they will infect? a. Capsule b. Cell wall c. Flagella d. Nucleoid

c. Fimbriae

______________ are surface appendages that allow a bacterium to stick to a surface. a. Cell walls b. Flagell c. Fimbriae d. Mitochondria e. Ribosomes