A honeybee collects nectar, which is rich in sucrose. The bee then breaks down the sucrose into its smaller sugar units. What is the name of the monomer and what is its primary role in the bee’s metabolism?

When a human cell breaks down glucose to produce ATP, what can be said about this process?

A biologist places a cell in a cold solution. How will the temperature of the solution affect the movement of molecules into and out of the cell?

Which of the following events is unique to prophase in a eukaryotic cell?

The bacterium E. coli is a common microbe found in the human intestine. What is the key characteristic of this organism’s cell that places it in the prokaryotic domain?

A cell is undergoing mitosis. A scientist observes that the sister chromatids are being pulled apart and are moving toward opposite poles of the cell. In which phase is this cell?

All of the following are true in regards to Roman Catholic funeral rites except:

Lemon juice has a pH of approximately 2. What does this indicate about the substance?

Pure water has a pH of 7 at room temperature. What does this pH value represent on the pH scale?

A teratoma is a tumor composed of different types of tissue that can include muscle, teeth, hair, or bone (Figure 1). Teratomas develop from germ cells, a type of cell that gives rise to gametes. Because germ cells are not differentiated into specific cell types (as are e.g. muscle cells, skin cells, fat cells, etc.), teratomas can develop exhibiting numerous different cell types, giving them their name teratoma, Greek for “monstrous tumor”. Teratomas may be benign or cancerous. As a result of mistakes in processes of cell division, they are generally diploid, and sometimes polyploid. Consider a cell of a teratoma and a healthy human epithelial (skin) cell. Now consider the DNA and the mRNA found in both cells. For each of these (DNA and mRNA), compare and contrast what you would expect to find in both the teratoma and a healthy cell, i.e., would the DNA and the mRNA be the same, or different, or partially the same and partially different, in each cell? Please explain briefly but clearly for each of these nucleic acids and provide examples or reasons. Label each of your answers 1 and 2 and write a short paragraph (a couple of sentences) for each. 1) DNA in teratoma vs. healthy cell 2) mRNA in teratoma vs. healthy cell Figure 1. Examples of teratomas showing uncontrolled and inappropriate growth and production of structures. Photo credits: Medscape (left) and Ed Uthman, MD (right).