Exam 4: A Tour of the Cell

The main function of the rough endoplasmic reticulum is the production of

A scientist wants to magnify a pollen grain 8,000 times and examine the ridges and pores on its surface. Which of the following instruments would be best?

The endomembrane system includes all of the following organelles except the

During cell reproduction, chromatin fibers coil up into structures called

Which of the following cells has the greatest surface-to-volume ratio?

The accompanying figure shows data from an experiment in which researchers measured how far dynein (a motor protein) traveled in the presence and absence of dynactin (another type of protein). The y-axis shows the percent of the time that the researchers observed either dynein or dynein + dynactin "walking" a certain distance on a microtubule. What can you conclude from these data?

Studies of the endomembrane system often involve the use of a protein that can emit a green fluorescence (glow). A researcher wants to make a video of cell behavior, so she initially labels the outer nuclear envelope of a cell with the fluorescent tag and records a video for several hours. Later, she sees that the tag is part of a transport vesicle very close to the plasma membrane. -The fluorescent tag likely became incorporated into which of the following organelles during the video?

According to the accompanying figure, which of the following are large enough to see in the light microscope?

The cells that produce hair made of protein contain a lot of ________, while the cells that produce the oils that coat the hair contain a lot of ________.

Which of the following statements about cells is true?

Mitochondria differ from chloroplasts in that mitochondria

A pathologist who wants to examine a patient's liver cells to determine if the mitochondria have an internal structural defect will likely need to use a

The skin is the body's largest organ. It's made up of many different types of cells. Oils, produced by the sebaceous glands, prevent the skin from drying and splitting. The pigment melanin, produced by melanocytes in the epidermis, protects the skin from the harmful effects of ultraviolet radiation. Sweat, released through ducts to the skin surface, helps to cool the body. The types of cells that produce these compounds have different numbers of specific organelles, depending on their function. -Melanocytes use many enzymes to produce melanin. Based on their function, you would expect melanocytes in the skin to have a higher than usual number of

A manufacturing company dumps its wastes into a nearby pond. One of the wastes is found to paralyze the contractile vacuoles of certain protists. A biologist looking at individual samples of these organisms taken from the pond would find that they

An immune system cell called the plasma cell produces thousands of antibodies (a type of protein) per second for release into the body. What type of intracellular structure would you expect to be very prominent within the cell?

The diameter of most animal and plant cells ranges from

The function of the nucleolus is

The oil from the sebaceous glands is produced by which of the following cell organelles?

Which of the following statements about plant cell walls is false?

Intermediate filaments