You have isolated DNA from three different cell types of an organism, determined the relative DNA content for each type, and plotted the results on the graph shown in Figure 13.3. Refer to the graph to answer the followingquestions.Figure 13.3Which sample might represent a sperm cell?

For the following questions, match the key event of meiosis with the stages listed below. I. Prophase V. Prophase II II. Metaphase I VI. Metaphase II III. Anaphase I VII. Anaphase II IV. Telophase I VIII. Telophase II Tetrads of chromosomes are aligned at the equator of the spindle; alignment determines independent assortment.

Plasmodesmata are small channels that directly connect the cytoplasm of neighboring plant cells to each other, establishing living bridges between cells. Question: In comparing eukaryotic animal and plants, which structures are most like these particular small channels?

Which of the following synthesizes short segments of RNA?

The following questions are based on Figure 12.3.Figure 12.3Which number represents replication of the genetic material of the cell?

Osmoregulation is the active regulation of the osmotic pressure of an organism’s body fluids. The importance is that it maintains the fluid balance and the concentration of electrolytes (salts in solution) that prevent the body fluids from becoming too diluted or concentrated. Question: What would accurately describes the optimal tonicity for typical animal and plant cells?

List Glucose Starch Cellulose Polypeptide   Question: Which of the following molecules CANNOT be included in the list above, as it is not a polymer?

A scientist studied the growth rate of bacteria found on public door handles of a department store. Question: Which statement would hold true about these cells?

“In a normal two-person conversation, more than 65% of the social meaning of what is communicated is conveyed:”

Which level of protein structure is being represented by the image showing an alpha-helix above?