Biol 1361 - Chapter 7 (Pearson)

Which of these structures stores, modifies, and packages products? D B E C A

A The Golgi apparatus modifies, stores, and packages products of the ER.

_____ is/are identical in structure to centrioles. Chromatin Mitochondria Basal bodies Nuclear envelopes Microfilaments

Basal bodies Basal bodies and centrioles have identical structures.

Choose the letter that indicates the organelle that contains most of a cell's DNA. E A C B D

C

The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter _____. A B C D E

C The plasma membrane is selectively permeable.

The DNA-containing region of this bacterial cell is indicated by the letter _____. A B C D E

D

Which of these is the double membrane that encloses the nucleus? E C D B A

E This is the nuclear envelope.

_____ are surface appendages that allow a bacterium to stick to a surface. Fimbriae Mitochondria Cell walls Ribosomes Flagella

Fimbriae Fimbriae enable bacterial cells to stick to a surface.

Which of these are hollow rods that shape and support the cell? plasma membrane microtubules chloroplasts microfilaments peroxisomes

Microtubules Microtubules are rods that also play a role in organelle movement.

Which of these organelles carries out cellular respiration? chromatin mitochondrion nucleolus ribosomes smooth endoplasmic reticulum

Mitochondrion Mitochondria convert the chemical energy of organic molecules to chemical energy in the form of ATP.

Ribosomal subunits are manufactured by the _____. peroxisome nucleolus smooth endoplasmic reticulum lysosome rough endoplasmic reticulum

Nucleolus Ribosomes are manufactured by the nucleolus.

_____ are the sites of protein synthesis. Peroxisomes Mitochondria Microfilaments Golgi apparatuses Ribosomes

Ribosomes Ribosomes are the site of protein synthesis.

For prokaryotic cells, which statement is correct concerning how the structure of a particular cell component correlates with its function? See Section 7.1 (Page) . View Available Hint(s) a) The cell wall is a tough, fibrous layer that protects the cell and gives it shape and rigidity. b) Photosynthetic membranes are composed of crosslinked polymers like peptidoglycan that provide extensive surface area for photosynthesis. c) The cell wall represents infoldings of the plasma membrane that protect the cell and give it shape and rigidity. d) Photosynthetic membranes contain magnetite that allows the cell to convert magnetic field energy into chemical energy.

a

What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell? capsule pili cell wall flagella nucleoid region

cell wall The cell wall is a rigid supporting structure.

The _____ is composed of DNA and protein. mitochondrion chromatin centriole flagellum ribosome

chromatin Chromatin is composed of DNA and protein.

Where is a bacterial cell's DNA found? ribosomes nucleus peroxisome nucleoid region capsule

nucleiod region Bacteria lack a nucleus; their DNA is found in the nucleoid region.

Which of these organelles produces H2O2 as a by-product? nucleus mitochondrion peroxisome centrioles flagellum

peroxisome Peroxisomes produce hydrogen peroxide as a by-product of their metabolic processes.

In a bacterium, where are proteins synthesized? ribosomes nucleus peroxisome nucleoid region capsule

ribosomes Ribosomes are involved in the manufacture of polypeptides (proteins).

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell. plasma membrane nucleoid region ribosome pili cell wall

plasma membrane The plasma membrane is selectively permeable.

The _____ is a selective barrier, regulating the passage of material into and out of the cell. lysosome nuclear envelope chloroplast nucleus plasma membrane

plasma membrane The plasma membrane regulates the passage of material into and out of the cell.

What is a function of a bacterium's capsule? DNA storage propulsion protein synthesis protection

protection A bacterium's capsule has a protective role.

Which of these organelles manufactures proteins bound for secretion out of the cell? nucleolus lysosomes rough endoplasmic reticulum Golgi apparatus

rough edoplasmic reticulum The ribosomes associated with the rough ER synthesize secretory proteins bound for the exterior of the cell. Further processing and packaging occurs in the Golgi apparatus.

Where is calcium stored? smooth endoplasmic reticulum mitochondria centrioles rough endoplasmic reticulum microtubule

smooth endoplasmic reticulum In addition to storing calcium, the smooth ER also plays a role in detoxification and lipid synthesis.