CHAPTER 4: MM (1-31)

Where is the genetic information of the cell stored?

nucleus

You have isolated a new eukaryotic organism which is unicellular and performs photosynthesis. The organism is most likely classified as a(n)

plant-like protista.

What structure acts as a selective barrier, regulating the traffic of materials into and out of the cell?

plasma membrane

Where are lipids made in the cell?

smooth endoplasmic reticulum (ER)

Choose the true statement about cilia and flagella. Cilia and flagella are surrounded by a membrane and sprout from centrioles. Cilia and flagella can be found in eukaryotes and prokaryotes. Both cilia and flagella use an oar-like motion for motility. Both cilia and flagella tend to be the same length.

Cilia and flagella are surrounded by a membrane and sprout from centrioles.

Animal cells are unique among all other eukaryotic groups in that they universally lack a cell wall.

true

Kingdom Fungi includes unicellular and multicellular organisms.

true

The four kingdoms of eukaryotes each include members that may conduct sexual and/or asexual reproduction.

true

The four kingdoms of eukaryotes include Animalia, Plantae, Fungi, and Protista

true

Prokaryotic and eukaryotic ribosomes share which of the following features?

composed of a large and a small subunit and composed of protein and rRNA

The structural framework in a cell is the

cytoskeleton

Protists are strictly unicellular.

false

Unlike antibiotics which target the 70S bacterial ribosomes, there are no known chemical substances which can bind to 80S eukaryotic ribosomes.

false

A researcher discovers a chemical compound which prevents the incorporation of ergosterol in the plasma membrane We can predict that this compound would be toxic to which kinds of organisms?

fungi

Bacterial plasma membranes differ from eukaryotic plasma membranes in that bacterial membranes always contain cholesterol while eukaryotic membranes rarely do.

FALSE

Choose the false statement about the eukaryotic cytoskeleton.

It is an extension of the glycocalyx.

Choose the true statement(s) concerning the eukaryotic glycocalyx. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

It plays a role in cell communications. It promotes or prevents cell adhesion where appropriate.

One of the ways smooth endoplasmic reticulum (ER) differs from rough endoplasmic reticulum is that rough ER is covered by

Ribosomes

Which of the following is mismatched? Nucleus: houses the cell's DNAMitochondria: site of ATP production in a cell Cytoskeleton: maintains the cell's shape Ribosomes: central to RNA production in a cell

Ribosomes: central to RNA production in a cell Ribosomes are made of RNA and protein, but they do not make RNA. Instead, they are responsible for building proteins.

You have isolated a new organism which has eukaryotic cells, is multicellular, grows as hyphae, does not perform photosynthesis, and has a cell wall. This organism most likely belongs to which kingdom?

fungi

The primary function of the nucleus is

housing the cell's DNA.

Which of the following organelles breaks down worn-out organelles

lysosomes Lysosomes contain digestive enzymes and break down worn-out organelles.

What carries instructions for making proteins from the nucleus into the cytoplasm?

mRNA

_____________ is a type of sexual reproduction that occurs in eukaryotes and results in four genetically unique haploid daughter cells.

meiosis

Where in a cell is ATP made?

mitochondria

Fungal infections are called

mycoses

Which of the following is part of the endomembrane system?

Golgi apparatus The endomembrane system includes the ER, the Golgi apparatus, lysosomes, and vesicles. It manufactures, processes, and transports lipids and proteins. The Golgi apparatus processes and packages proteins.

Choose the true statement(s) about mitochondria. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer Mitochondria do not have their own DNA. Mitochondria have 70S ribosomes. Mitochondria make most of a cell's ATP. Photosynthetic cells lack mitochondria.

Mitochondria have 70S ribosomes. Mitochondria make most of a cell's ATP.

Mitochondria do not participate in which function?

Motility

Select the false statement about the differences between eukaryotes and prokaryotes. -Prokaryotic cells can exhibit both asexual and sexual reproduction, whereas eukaryotes only carry out asexual reproduction. -Prokaryotes only include unicellular archaea and bacteria. -Eukaryotes have a defined nucleus and other membrane bound organelles, while prokaryotes lack a nucleus. -Most prokaryotes have a single circular chromosome, as compared to a eukaryote's larger genome spread across multiple linear chromosomes.

Prokaryotic cells can exhibit both asexual and sexual reproduction, whereas eukaryotes only carry out asexual reproduction.

describes eukaryotic cells?

They contain membrane-bound organelles such as a nucleus.