Cell Biology

Thylakoids and cristae are respectively structures of Select one: a. lysosomes and the endoplasmic reticulum. b. the nucleus and nucleolus. c. chloroplasts and mitochondria. d. lysosomes and chloroplasts. e. the cell wall and the plasma membrane.

c. chloroplasts and mitochondria.

According to the endosymbiotic theory, eukaryotes became the mitochondria and chloroplasts found in prokaryotic cells. T or F

False

Bacteria are metabolically limited compared to other organisms. T or F

False

Since all organisms carry on cellular respiration, all living cells must contain mitochondria. T or F

False

Which organelle forms a membranous system of channels for intracellular transport? Select one: a. endoplasmic reticulum and golgi apparatus b. centrioles c. cytoskeleton material d. lysosomes e. mitochondria

a. endoplasmic reticulum and golgi apparatus

Compared with a eukaryotic cell, a prokaryotic cell Select one: a. lacks organelles beyond ribosomes. b. is larger. c. does not require energy. d. is not living. e. has no method of movement.

a. lacks organelles beyond ribosomes.

An agent would make a good antibiotic if it affected a structure or process only found in bacterial cells and not in our (eukaryotic) cells. Which of the following actions would theoretically make a good antibiotic? Select one: a. prevents repair of the peptidoglycan cell wall b. damages the nuclear membrane c. damages DNA d. prevents ribosomes from producing proteins e. stops cellular respiration

a. prevents repair of the peptidoglycan cell wall

If the mitochondrion is the result of endosymbiosis, what membrane of the mitochondrion represents the engulfing vesicle? Select one: a. the outer mitochondrial membrane b. vacuole c. cristae d. thylakoid membrane e. grana

a. the outer mitochondrial membrane

The _____ is involved in collecting, sorting and distribution of molecules. Select one: a. ribosomes b. Golgi apparatus c. lysosome d. rough endoplasmic reticulum e. smooth endoplasmic reticulum

b. Golgi apparatus

Centrioles Select one: a. consist of 9 + 2 pattern. b. are composed of microtubule triplets. c. carry on cellular respiration. d. are found in plant cells. e. are composed of actin.

b. are composed of microtubule triplets.

Mucus moves up the respiratory tract by Select one: a. flagella. b. cilia. c. Golgi apparatus. d. centrioles. e. endoplasmic reticulum.

b. cilia.

Which type of microscope provides the greatest resolution? Select one: a. compound light microscope b. transmission electron microscope c. stereo light microscope d. scanning electron microscope e. any light microscopes

b. transmission electron microscope

If cells were moved to a low-gravity environment, such as in space exploration, a change would most likely be expected in the Select one: a. nucleus and the genetic process. b. chloroplast and energy capture. c. cytoskeleton. d. vacuoles and lysosomes. e. mitochondrion and energy release.

c. cytoskeleton.

Each time water in a cell freezes slowly, long sharp crystals spear through the membrane structures of the cell. The most reasonable explanation for the bad taste of meat that has "freezer burn" from repeated freezing is the destruction of Select one: a. the nuclear membrane, causing mixing of nucleoplasm and cytoplasm. b. ribosomes, causing them to break into subunits. c. lysosomes, and the resultant self-digestion. d. rough endoplasmic reticulum causing the release of ribosomes. e. the Golgi apparatus and vesicles.

c. lysosomes, and the resultant self-digestion.

Which organelle will use up oxygen and give off carbon dioxide and water? Select one: a. lysosomes b. Golgi apparatus c. mitochondria d. chloroplasts e. endoplasmic reticulum

c. mitochondria

Ribosomes are composed of Select one: a. fat. b. RNA. c. protein. d. RNA and protein. e. sugar.

d. RNA and protein.

Both plant and animal cells have mitochondria because they both Select one: a. carry on photosynthesis. b. have a large central vacuole. c. have endoplasmic reticulum. d. need ATP for energy. e. have lysosomal hydrolytic enzymes.

d. need ATP for energy.

Protein synthesis occurs at the Select one: a. mitochondria. b. leucoplast. c. Golgi apparatus. d. ribosomes. e. lysosome.

d. ribosomes.

The ____ will store pigments and toxins in plant cells. Select one: a. chloroplast b. chromoplasts c. leucoplasts d. vacuole e. mitochondria

d. vacuole

Surface-area-to-volume ratios indicate Select one: a. cells must exceed a certain minimum size. b. as cells get larger, their surface area actually decreases. c. largest cells have less proportionate need for food intake and waste removal. d. a chicken egg is one cell thus demonstrating the upper limit for metabolizing cell size. e. as cells get larger, their surface area gets larger but at a slower rate than volume increases.

e. as cells get larger, their surface area gets larger but at a slower rate than volume increases.

Which of the following is a prokaryotic cell? Select one: a. plant cell b. liver cell c. muscle cell d. paramecium e. bacterium

e. bacterium

Which organelle will give off oxygen and use up carbon dioxide? Select one: a. Golgi apparatus b. rough endoplasmic reticulum c. lysosomes d. mitochondria e. chloroplasts

e. chloroplasts

Which of these is best associated with plant cells? Select one: a. cilia and flagella b. chloroplasts and centrioles c. rounded shape and flexibility d. cell membrane and small vesicles e. chloroplasts and cell wall

e. chloroplasts and cell wall

The origin of cell organelles in eukaryotes is not possibly attributed to Select one: a. invagination of the plasma membrane to form endoplasmic reticulum. b. incorporation of engulfed heterotrophic bacteria to form mitochondria. c. incorporation of engulfed autotrophic cyanobacteria to form chloroplasts. d. an elongated bacterium that became attached to a host cell. e. groups of prokaryotic cells begin to live in a small group sharing products of metabolism.

e. groups of prokaryotic cells begin to live in a small group sharing products of metabolism.

Which organelle primarily functions to package or regulate the production of H2O2? Select one: a. lysosome b. vacuole c. Golgi apparatus d. endoplasmic reticulum e. peroxisome

e. peroxisome