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