Log in to make full use of the services
Base your answers to questions 1 on the information below and on your knowledge of biology.
Diabetes is a condition characterized by elevated blood sugar levels. One form of diabetes occurs when insulin fails to properly regulate blood sugar levels. Complications from diabetes can include nerve cell damage and poor blood flow, especially in the feet and legs. In individuals with diabetes, wounds usually take longer than normal to heal.
One reason for the change in wound healing time in a diabetic is that*
The human body has many cells that are deep inside the body. For this reason, the human body requires*
Plant cells can synthesize energy-rich organic molecules, and later break them down to extract that energy for performing life processes. These activities require direct interaction between the*
Which two cell structures work together in the process of protein synthesis?*
Which observation could lead to the conclusion that an object is nonliving?*
An ameba is a single-celled, heterotrophic organism. In order to meet its energy needs, it relies directly on the interaction of which cell structures?*
Base your answers to questions 7 on the information below and on your knowledge of biology.
Anabolic steroids are hormones that affect muscle growth. Many athletes take synthetic anabolic steroids, in hopes of developing larger muscles so they can perform better at their sport. These hormones can act like the hormone testosterone. When men take an excess of anabolic steroids, they can have an increase in feminine features. This is due to the fact that the excess of these chemicals signals the male body to stop producing testosterone.
This signal in the male body to stop producing testosterone is an example of*
Which statement best describes the organelles in a cell?*
Recently, researchers from Stanford University have changed mouse skin cells into mouse nerve cells. This was accomplished by inserting genes that control the synthesis of certain proteins into the skin cells. This type of research is often successful in advancing knowledge regarding the functioning of human cells because*
Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?*
Base your answers to questions 11 on the diagram below and on your knowledge of biology. The diagram represents an experimental setup.
Which term correctly identifies the process by which molecules move through the dialysis tube membrane?*
Base your answers to questions 12 on the information and diagram below and on your knowledge of biology.
Each body cell contains the same genetic information, but can differ in appearance and size. The diagram below shows three different types of cells found in the human body.
Explain why differences in these human body cells are a biological advantage. *
The diagram below represents a laboratory setup used to demonstrate the movement of molecules across a selectively permeable membrane.
In the diagram below, draw the 5 starch and the 12 glucose molecules to show where they would most likely be located after 15 minutes. 
The diagram below represents two types of carbohydrate molecules, glucose and sucrose.
State one reason why a glucose molecule is more likely than a sucrose molecule to diffuse through an artificial membrane. .*
Base your answers to questions 15 on the diagram below and on your knowledge of biology. The diagram represents three sections of a cell membrane showing three different methods involved in the transport of various molecules across the membrane.
Using information from the diagram, state one reason why the movement of molecules in method C represents active transport. *