Ch 4

Which pairing of organism and the chemical component of its cell wall is matched INCORRECTLY? A) Plants: cellulose B) Protista: cellulose, silica, or other components C) Animals: cholesterol D) Bacteria: peptidoglycan E) Fungi: chitin

C) Animals: cholesterol

Which statement is NOT true about eukaryotic ribosomes? A) Ribosomes found in mitochondria are 70S rather than the 80S type found in the cytoplasm. B) Both bound and free ribosomes consist of a 40S and a 60S subunit. C) Bound ribosomes are always bound while free ribosomes are always free. D) Bound ribosomes produce proteins that are destined for secretion from the cell. E) Bound ribosomes are attached to the endoplasmic reticulum (ER).

C) Bound ribosomes are always bound while free ribosomes are always free.

The _______ resembles a series of flat sacs called cisternae. This organelle modifies, builds, sorts, and distributes products to the cell membrane to be secreted. A) Smooth endoplasmic reticulum B) Rough endoplasmic reticulum C) Golgi apparatus D) Plasma membrane

C) Golgi apparatus

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 A) Mitochondria do not have their own DNA. B) Photosynthetic cells lack mitochondria. C) Mitochondria make most of a cell's ATP. D) Mitochondria have 70S ribosomes.

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

Choose the true statement(s) about protists. To be marked correct, you'll need to select all true statements, as there may be more than one correct answer. A) Protozoans are multicellular protists. B) Protists only reproduce by asexual means. C) The term protozoan describes animal-like protists but is not a true taxonomic ranking. D) Protists can be photosynthetic or heterotrophic.

C) The term protozoan describes animal-like protists but is not a true taxonomic ranking. D) Protists can be photosynthetic or heterotrophic.

The primary function of the nucleus is A) production of the cell's energy molecule, ATP. B) serving as the site of ribosome synthesis of protein. C) housing the cell's DNA. D) digestion and processing of nutrients. E) serving as the site of most of the cell's chemical reactions.

C) housing the cell's DNA.

What structure acts as a selective barrier, regulating the traffic of materials into and out of the cell? A) cytoskeleton B) extracellular matrix C) plasma membrane D) nuclear envelope E) endomembrane system

C) plasma membrane

One of the ways smooth endoplasmic reticulum (ER) differs from rough endoplasmic reticulum is that rough ER is covered by A) mitochondria. B) the cytoskeleton. C) ribosomes. D) the extracellular matrix. E) the Golgi apparatus.

C) ribosomes.

Vesicles that bud off the ER are typically shuttled to the ________ where their contents can be modified, sorted, and distributed. A) Golgi apparatus B) nucleus C) mitochondria D) plasma membrane E) lysosome

A) Golgi apparatus

_________ are a collection of tubular structures, either septate or aseptate, which allow for growth in most fungi. A) Hyphae B) Mycoses C) Spores D) Conidiospores

A) Hyphae

____________ is a type of sexual reproduction that occurs in eukaryotes and results in four genetically unique haploid daughter cells. A) Meiosis B) Binary fission C) Endosymbiosis D) Mitosis

A) Meiosis

Which of the following is mismatched? A) Ribosomes: central to RNA production in a cell B) Mitochondria: site of ATP production in a cell C) Cytoskeleton: maintains the cell's shape D) Nucleus: houses the cell's DNA

A) Ribosomes: central to RNA production in a cell

The structural framework in a cell is the A) cytoskeleton. B) endoplasmic reticulum (ER). C) extracellular matrix. D) plasma membrane. E) endomembrane system.

A) cytoskeleton.

Which of the following organelles breaks down worn-out organelles? A) lysosomes B) rough endoplasmic reticulum (ER) C) mitochondria D) smooth endoplasmic reticulum (ER) E) Golgi apparatus

A) lysosomes

Which of the following is part of the endomembrane system? A) mitochondria B) Golgi apparatus C) ribosomes D) cytoskeleton E) flagellum

B) Golgi apparatus

Choose the FALSE statement about the eukaryotic cytoskeleton A) It assists with maintaining the cell's shape. B) It is an extension of the glycocalyx. C) It arises from the centrosome. D) It protects against external mechanical stress forces.

B) It is an extension of the glycocalyx.

The chromatin is A) the site where ribosomal subunits begin their development. B) a collection of DNA and protein. C) an organelle which is continuous with the nuclear envelope. D) the entry and exit point for material into and out of the nucleus. E) a liquid filling the nucleus.

B) a collection of DNA and protein.

Prokaryotic and eukaryotic ribosomes share which of the following features? A) composed of protein and rRNA B) composed of a large and a small subunit and composed of protein and rRNA C) contain a large and a small subunit D) function is making DNA E) composed of protein and rRNA, composed of a large and a small subunit, and function is making DNA

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

Most helminthic parasites spend at least some part of their life cycle in the A) genitourinary tract. B) gastrointestinal tract. C) skin. D) respiratory tract. E) cardiovascular system.

B) gastrointestinal tract.

Where is the genetic information of the cell stored? A) Golgi apparatus B) nucleus C) rough endoplasmic reticulum (ER) D) lysosomes E) smooth endoplasmic reticulum (ER)

B) nucleus

Where are lipids made in the cell? A) ribosomes B) smooth endoplasmic reticulum (ER) C) Golgi apparatus D) mitochondria E) rough endoplasmic reticulum (ER)

B) smooth endoplasmic reticulum (ER)

Evidence in support of the endosymbiotic theory includes A) the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts linear DNA in mitochondria and chloroplasts. B) the presence of 70S ribosomes in mitochondria and chloroplasts. C) linear DNA in mitochondria and chloroplasts.the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts. D) a single membrane enclosing the mitochondria and chloroplasts.

B) the presence of 70S ribosomes in mitochondria and chloroplasts.

Which of the following is mismatched? A) Zygospores: sexual reproduction B) Basidiospores: sexual spores found in mushroom C) Sporangiospores: asexual spores D) Ascospores; asexual reproduction

D) Ascospores; asexual reproduction

Which of the following processes is INCORRECTLY matched to its description? A) Exocytosis: Exports materials out of a cellReceptor-mediated B) Endocytosis: Uses specific binding between structures on the plasma membrane binding to ligands C) Pinocytosis: Imports dissolved substance using small vesicles D) Phagocytosis: Imports undissolved substances but not whole cells or viruses E) Endocytosis: Imports materials into a cell

D) Phagocytosis: Imports undissolved substances but not whole cells or viruses

Which of the following vesicles is INCORRECTLY matched with its function? A) Transport vesicles: move substances around the cell B) Peroxisomes: contain enzymes that break down fats and amino acids and protect the cell from hydrogen peroxide C) Lysosomes: contain hydrolytic enzymes and act as garbage disposal tools for the cell D) Secretory vesicles: ferry digestive enzymes to the endoplasmic reticulum

D) Secretory vesicles: ferry digestive enzymes to the endoplasmic reticulum

Which of the following statements describes eukaryotic cells? A) They may contain a cell wall made of peptidoglycan. B) They have a cell wall. C) They may divide using binary fission, mitosis, or meiosis. D) They contain membrane-bound organelles such as a nucleus. E) They may contain 80S or 70S ribosomes in their cytoplasm.

D) They contain membrane-bound organelles such as a nucleus.

A similarity between mitosis and meiosis is A) production of genetically unique daughter cells. B) production of daughter cells with the same number of chromosomes as the parent. C) two sequential cell divisions. D) copying DNA before the cell divides. E) sexual reproduction.

D) copying DNA before the cell divides.

Which persons may be at increased risk for mycoses? A) those with weakened immune systems B) those who have not received the recommended vaccine schedule C) those who have had their normal microbiome disrupted by antibiotic therapy D) either those with weakened immune systems or those who have had their normal microbiome disrupted by antibiotic therapy E) either those with weakened immune systems or those who have not received the recommended vaccine schedule

D) either those with weakened immune systems or those who have had their normal microbiome disrupted by antibiotic therapy

Which does not describe eukaryotic flagella? A) anchored by a basal body connected to a centriole B) plasma membrane-enclosed C) whip-like motion D) flagellin protein E) 9+2 arrangement of microtubules

D) flagellin protein

What carries instructions for making proteins from the nucleus into the cytoplasm? A) DNA B) Rough ER C) ATP D) mRNA E) ribosomes

D) mRNA

Protozoans are mainly grouped by their __________. A) nutritional requirements B) spore-forming potential C) mode of reproduction D) means of motility

D) means of motility

Where in a cell is ATP made? A) ribosomes B) chloroplasts C) lysosomes D) mitochondria E) nucleus

D) mitochondria

Fungal infections are called A) basidium. B) sporgangia. C) coencytic. D) mycoses. E) dimorphic.

D) mycoses.

Where are cilia found in the human body? A) female reproductive system B) lining blood vessels C) oral cavity D) upper respiratory tract E) large intestine

D) upper respiratory tract

Which statement does NOT describe helminthic parasites? A) All belong to one of two groups: roundworms or flatworms. B) All reproduce sexually. C) An important mode of transmission is ingestion of the eggs or organism from feces-contaminated food and water. D) All tend to have complex life cycles that can involve different host species. E) All are hermaphroditic.

E) All are hermaphroditic.

Which is not a function which the cytoskeleton performs? A) movement of chromosomes during cell division B) movement of the cell C) transport of vesicles and organelles D) protection from external forces E) passive transport of substances through the plasma membrane

E) passive transport of substances through the plasma membrane