Chapter 6

tubulin

Cells require which of the following to form cilia or flagella?

3′-UAACGU-5′

If one strand of a DNA molecule has the sequence of bases 5′-ATTGCA-3′, the mRNA synthesized following the template will be ________.

in the nucleus, mitochondria, and chloroplasts

If plant cells are grown on media containing radioactively labeled thymine for one generation, radioactively labeled macromolecules will be detected in which of the following?

components of the cytoskeleton

Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures?

Cytoskeleton 2. Mitochondria 3. Vacuole 4. Free ribosome 5. Nucleus 6. Rough ER 7. Smooth ER 8. Golgi Apparatus 9. Plasma membrane 10. Lysosome Be ready for more specific labeling as well! i.e. cis/trans side of Golgi

Picture of Cell

motor proteins

Researchers investigating the mechanism of vesicular transport assembled a cell-free system that included microtubule tracks, vesicles, and ATP. However, they observed no movement of transport of vesicles in this system. What were they missing?

the lysosome

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?

transmitting signals from the extracellular matrix to the cytoskeleton

What is a primary function of integrins?

a covalent bond forms between the sugar of one nucleotide and the phosphate of a second

When nucleotides polymerize to form a nucleic acid, ________.

ribosomes

Which of the following are found in plant, animal, and bacterial cells?

a nitrogenous base, a phosphate group, and a sugar

Which of the following descriptions best fits the class of molecules known as nucleotides?

ratios of surface area to volume

Which of the following frequently imposes a limit on cell size?

type of sugar

Which of the following is a major difference between RNA and DNA?

ribosomal proteins

Which of the following macromolecules enter the nucleus of a eukaryotic cell through pores in the nuclear membrane?

Golgi apparatus

Which of the following organelles produces and modifies polysaccharides that will be secreted?

chloroplast

Which structure below is independent of the endomembrane system?