Random Quiz Questions Chp 7 Flashcards
Which one of the following eukaryotic cell structures does not contain DNA?
a. a nucleus
b. a mitochondrion
c. the endoplasmic reticulum
d. a chloroplast
The answer is c. The endoplasmic reticulum does not contain DNA.
Which of the following is not an accurate description of a chromosome?
a. It is a colored body localized in the nucleus.
b. It is a protein and nucleic acid complex.
c. It is the cellular structure that contains the genetic material.
d. In eukaryotes, it is composed of many DNA molecules attached end to end.
The correct response is d. The chromosome is not composed of many DNA molecules attached end to end.
A centriole is an organelle that is:
a. present in the center of a cell’s cytoplasm
b. composed of microtubules and important for organizing the spindle fibers
c. surrounded by a membrane
d. part of a chromosome
The correct answer is b. The centriole is composed of microtubules and is important for organizing the spindle fibers.
The rough endoplasmic reticulum is:
a. an intracellular double-membrane system to which ribosomes are attached
b. an intracellular membrane that is studded with microtubular structures
c. a membranous structure found within mitochondria
d. only found in prokaryotic cells
The answer is a. The rough endoplasmid reticulum (RER) is an intracellular double-membrane system to which ribosomes are attached.
In the nucleus of eukaryotic cells, the genetic material is complexed with protein and organized into linear structures called:
a. centrioles
b. histones
c. chromosomes
d. plasmids
The answer is c. The genetic material is organized into chromosomes.
Which of the following statements does not apply to the nuclear envelope?
a. It is a double membrane.
b. It has pores through which material enters and leaves.
c. It is continuous with the endoplasmic reticulum.
d. It has infoldings to form cristae.
The answer is d. It is the inner membrane of the mitochondrion that is infolded to form cristae.
Some proteins are found in the plasma membrane. What part of the protein is within the membrane itself?
a. hydrophilic region
b. hydroponic region
c. hydrophobic region
d. hydrocoel region
The correct response is c. Hydrophobic region. Typically a protein will span the plasma membrane a number of times, with hydrophobic (“water-hating”) regions in the membrane and hydrophilic (“water-loving”) regions inside the cell or outside of the cell.
What is the simplest level of packing of the eukaryotic chromosome?
a. the nucleolus
b. the nucleoid
c. the nucleosome
d. the nucleoplasm
The correct response was c. The nucleosome is the simplest level of packing of the eukaryotic chromosome. It consists of a histone octamer core (two copies each of H2A, H2B, H3 and H4), the DNA wound around it, and one molecule of histone H1.
Lysosomes are formed by budding from which cellular organelle?
a. smooth endoplasmic reticulum
b. Golgi apparatus
c. rough endoplasmic reticulum
d. nucleus
The correct answer is b. Lysosomes form by budding from the Golgi apparatus and, during this process, the hydrolytic enzymesÑmade on the rough ER by bound ribosomesÑare packaged into particles.
All peroxisomes carry out this function:
a. break down fats and amino acids into smaller molecules that can be used for energy production by mitochondria
b. digest macromolecules using the hydrolytic enzymes they contain
c. synthesize membrane components such as fatty acids and phospholipids
d. control the flow of ions into and out of the cell
The correct response is a. All peroxisomes break down fats and amino acids into smaller molecules that can be used for energy production by mitochondria.
Which of the following does not apply to chloroplasts?
a. They contain chlorophyll and the enzymes required for photosynthesis.
b. They contain an internal membrane system consisting of thylakoids.
c. They synthesize ATP (adenosine triphosphate) from ADP (adenosine diphosphate) and Pi (inorganic phosphate).
d. They are bounded by two membranes, the inner of which is folded into the cristae.
The correct response is d. Cristae are found only in mitochondria.
Which of the following is an enzyme filled organelle for breaking down waste in the cell?
- lysosome
- chloroplast
- mitochondria
- golgi body
lysosome
What are two of the three major differences between animal cells and plant cells?
1: chloroplasts
2: cell wall
3: large vacuole
Answers may vary.
The organelle responsible for storing water in the plant cell is the____.
- golgi body
- endoplasmic reticulum
- vacuole
- ribosome
- mitochondria
vacuole
The Modern Cell Theory states that all cells come from
- non-living material
- nothingness
- other existing cells
- none of these
other existing cells
This organelle serves as a “workbench” for the ribosomes.
- Golgi Body
- Nuclear Membrane
- Endoplasmic Reticulum
Endoplasmic Reticulum
These cells contain chloroplasts
- plant
- animal
- both plant and animal
plant
These cells contain a membrane bound nucleus.
- prokaryotic
- eukaryotic
eukaryotic
Which of the following do NOT have a cell wall?
- plant cells
- all bacterial cells
- fungi
- animal cells
animal cells
The cell membrane is composed of
- a single layer of proteins
- a phospholipid bi-layer
- a carbohydrate bi-layer
- a single layer of lipids
a phospholipid bi-layer
This organelle is found in animal cells and is used in cell division; the spindle fibers attach to it.
- vacuole
- chloroplast
- nucleus
- ribosomes
- centriole
centriole
Rank the following terms from simplest to most complex: cells, organelles, organs, tissue, organism.
Sample answer:
organelle>cell>tissue>organ>organism
Answers may vary.
Proteins embedded in the cell membrane function to
- transport materials in and out of the cell
- carry genetic information
- store excess water
- produce energy for the cell
transport materials in and out of the cell
Which of the following is the energy supplier for the cell; this organelle contains its own DNA
- lysosome
- mitochondria
- golgi apparatus
- endoplasmic reticulum
- ribosome
mitochondria
These cells have larger vacuoles
- plant
- animal
- both plant and animal
plant
If a cell is like a school, then the nucleus would be …..
Sample answer:
the principal, or the office
This organelle stores the DNA in the cell.
- nucleus
- chloroplast
- vacuole
nucleus
The major job of the ribosome is to
- make fats.
- make proteins
- break down proteins
- make sugars
make proteins
The ____________ acts as a packaging and processing center in the cell to process proteins.
- Smooth E.R.
- Rough E.R.
- Golgi Body
- Nucleus
Golgi Body
Which of the following are characteristics of both bacteria and fungi?
cell wall, unicellularity, and mitochondria cell wall, DNA, and plasma membrane nucleus, organelles, and unicellularity plasma membrane, multicellularity, and Golgi apparatus nucleus, RNA, and cell wall
Both bacteria and fungi contain DNA, a plasma membrane, and a cell wall.
The stored form of sugar in humans.
Glycogen Cellulose Protein Triglyceride Nucleic Acid
Glycogen is an animal starch is stored in the liver and muscles.
A substance that cannot be broken down by cows
Glycogen Cellulose Protein Triglyceride Nucleic acid
Cellulose cannot be break broken down by cows which explains why they need bacteria in their stomachs.