Exam 5: The Working Cell

Ten kilocalories are equivalent to ________ calories.

The figure below shows that ________.

Which component of the following reaction is the substrate? sucrose + sucrase + water → sucrase + glucose + fructose

Which of the following is a measure of randomness in a system?

What is energy?

Read the following scenario to answer the following question(s). Biomedical scientists have recently developed an anticancer drug delivery system that sneaks the anticancer drug into cancer cells before releasing it.They were able to do this by using two sets of liposomes.An anticancer drug (Doxorubicin (Dox))bound to DNA molecules was added into one set of liposomes (type A),and a high concentration of ATP molecules were added to the other set of liposomes (type B).The drug is inactive when bound to DNA molecules.Researchers inject both types of liposomes (A and B)into cancer cells,and upon doing so their contents are released.The ATP molecules (from liposome type A)bind to the DNA molecules (from liposome type B)and activate the drug,thus inducing cell death and decreasing tumor size. Mice with breast cancer tumors were treated with this liposome system to test the effectiveness of the drug.The scientists performed three trials one with both types of liposomes (Dox + ATP),one with just the drug (Dox only),and one with a salt solution (control).Examine the figure below and answer the following questions. -What statement regarding this data is TRUE?

Facilitated diffusion across a biological membrane requires ________ and moves a substance ________ its concentration gradient.

What molecules are scientists currently trying to use to power nanotechnology devices,such as microscopic robots?

Which component of the following reaction is the enzyme? sucrose + sucrase + water → sucrase + glucose + fructose

An enzyme's function is most dependent on its ________.

Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach.Which of the following processes could be responsible for its secretion?

Humans convert approximately ________ of the energy stored in food to useful work.

Active transport ________.

If placed in tap water,an animal cell will undergo lysis,whereas a plant cell will not.What accounts for this difference?

Energy is transferred from ATP to other molecules by transferring a(n)________.

Which one of the following is TRUE?

Read the following scenario to answer the following question(s). Biomedical scientists have recently developed an anticancer drug delivery system that sneaks the anticancer drug into cancer cells before releasing it.They were able to do this by using two sets of liposomes.An anticancer drug (Doxorubicin (Dox))bound to DNA molecules was added into one set of liposomes (type A),and a high concentration of ATP molecules were added to the other set of liposomes (type B).The drug is inactive when bound to DNA molecules.Researchers inject both types of liposomes (A and B)into cancer cells,and upon doing so their contents are released.The ATP molecules (from liposome type A)bind to the DNA molecules (from liposome type B)and activate the drug,thus inducing cell death and decreasing tumor size. Mice with breast cancer tumors were treated with this liposome system to test the effectiveness of the drug.The scientists performed three trials one with both types of liposomes (Dox + ATP),one with just the drug (Dox only),and one with a salt solution (control).Examine the figure below and answer the following questions. -What would be the best experiment to test the effectiveness of this anticancer drug system?

Running burns approximately 600 Calories per hour.If you ate four hard-boiled eggs,how long would you have to run to burn them off?

A balloon permeable to water but not to glucose contains a 10% glucose solution.A beaker contains a 5% glucose solution.Which of the following is TRUE?

The principle that energy cannot be created or destroyed is known as ________.