Biology Chapter 6

Which of the following is a major cause of the size limits for certain types of cells? 

•  the difference in plasma membranes between prokaryotes and eukaryotes 
• the need for a surface area of sufficient area to support the cell's metabolic needs 
• the need for a surface area of sufficient area to support the cell's metabolic needs 
• rigid cell walls that limit cell size expansion

Which of the following statements concerning bacteria and archaea cells is correct?

• Archaea cells contain a membrane-bound nucleus; bacteria do not. 
• Archaea cells contain small membrane-enclosed organelles; bacteria do not. 
• DNA is present in both archaea cells and bacteria cells.
• DNA is present in the mitochondria of both bacteria and archaea cells.

The evolution of eukaryotic cells most likely involved...

• endosymbiosis of an aerobic bacterium in a larger host cell–the endosymbiont evolved into mitochondria. 
•  anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen–the anaerobic bacterium evolved into chloroplasts. 
• an endosymbiotic fungal cell evolved into the nucleus. 
• acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the Golgi.Answer: A

Prokaryotes are classified as belonging to two different domains. What are the domains? 

•  Bacteria and Eukarya 
•  Archaea and Protista 
•  Bacteria and Archaea 
• Bacteria and Fungi

If radioactive deoxythymidine triphosphate (dTTP) is added to a culture of rapidly growing bacterial cells, where in the cell would you expect to find the greatest concentration of radioactivity? 

• nucleus 
•  cytoplasm 
• endoplasmic reticulum 
•  nucleoid 

Which organelle or structure is absent in plant cells? 

•  mitochondria 
•  Golgi vesicles 
•  microtubules 
•  centrosomes 

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules? 

•  lipids 
• glycogen
• proteins 
• cellulose 

The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you expect to be the most likely consequence? 

•  the inability of the nucleus to divide during cell division
•  a change in the shape of the nucleus
•  the loss of all nuclear function
•  failure of chromosomes to carry genetic information

Recent evidence shows that when chromosomes decondense during interphase, their DNA molecules do not intermingle. Instead, they occupy distinct territories within the nucleus. Considering the structure and location of the following structures, which is most likely to be involved in chromosome location? 

• nuclear pores 
• the nuclear lamina 
•  microfilaments 
•  the nuclear matrix

Which organelle is the primary site of ATP synthesis in eukaryotic cells? 

• Lysosome
• Vacuole
• Mitochondrion
• Golgi Apparatus