Exam 4: Cell Structure and Function

An amino sugar called N-acetylmuramic acid is an important building block of the cell wall of some bacteria.Penicillin prevents this amino sugar from being incorporated into the bacterial cell wall.Based on this information,select all the of the following statements that are true.

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -Which figure has the greatest surface-area-to-volume ratio?

Cell biologists have introduced radioactively labeled carbohydrates,fats,and amino acids to living cells,allowed time for cell metabolism,and then placed the cells in a blender and separated out the various cell organelles from the cytoplasm.They found the radioactive molecules could soon be detected as part of various cellular compounds,although the visible cell structures appeared unchanged.Which of the following is the best conclusion based on this information?

Which of the following organelles is found in autotrophic eukaryotic cells but not heterotrophic eukaryotic cells?

Mitochondria and chloroplasts are able to reproduce independently from the division of the cell.

Which of the following is true regarding the surface area-to-volume ratio needed for cells to function properly?

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -If the figures represented cells,what size cell has the greatest potential to bring nutrients in and rid itself of waste?

Membrane-bounded vesicles that contain enzymes that break down fatty acids while producing hydrogen peroxide as a waste product are called

Use figures A, B, and C to answer the following questions. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. -What figure has the greatest surface area (height x width x number of sides x number of cubes)?

The central vacuole

As they flow over rotten logs,slime molds appear to lack any partitioning into individual cells; however,slime molds do become cellular when they change form to produce spores.In light of the cell theory that "all living things are composed of cells," then

During the sequencing of DNA into a protein,what is the first step?

DNA is housed within the nucleus,but the mRNA code needs to leave in order to be translated into a protein.How does the mRNA code leave the nucleus if the nucleus is surrounded by the nuclear envelope?

A researcher is studying the effects of a new drug on the endomembrane system.She notices the Golgi apparatus is not receiving any proteins and that it is not able to ship any proteins.What part of the endomembrane system was probably affected by this new drug?

Which of the following is NOT offered as evidence in support of the endosymbiotic theory,which proposes that eukaryotic cells have evolved as a "committee" of prokaryotic cells?