2007 ap biology essay answer

To get a 4 or 5, you need to get a large portion, but not all, of the questions right. The more you know about the question types, the better equipped you will be to handle them. There are no two questions connected to each other in any way. A genetics question may follow a taxonomy question, which may follow a question about the Krebs cycle.

2007 ap biology essay answer

Why are cells so small? Explain the relationship of surface area to volume. Cells are small because a high surface-to-volume ratio facilitates the exchange of materials between a cell and its environment. As a cell or any other object increases in size, its volume grows proportionally more than its surface area.

2007 ap biology essay answer

Area is proportional to a linear dimension cubed. Thus, a smaller object has a greater ratio of surface area to volume.

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How do these structures relate to the function of intestinal cells? Microvilli are long, thin projections from the cell surface, which increase surface area without an appreciable increase in volume.

A sufficiently high ratio of surface area to volume is especially important in cells that exchange a lot of materials with their surroundings, such as intestinal cells.

In the following figure, label the nuclear envelope, nuclear pores, and pore complex. See page of your text for the labeled figure. Describe the nuclear envelope. How many layers is it? What connects the layers?

The nuclear envelope encloses the nucleus, separating its contents from the cytoplasm. The nuclear envelope is a double membrane, meaning that there are two lipid bilayers. The nuclear lamina, a netlike array of protein filaments, connects the layers of the nuclear envelope.

What is the nuclear lamina? The nuclear lamina is the netlike array of protein filaments that maintains the shape of the nucleus by mechanically supporting the nuclear envelope. The nuclear matrix is a framework of protein fibers extending throughout the nuclear interior.

The nuclear matrix and nuclear lamina may help organize the genetic material so it functions efficiently. Found within the nucleus are the chromosomes. They are made of chromatin. What are the two components of chromatin? When do the thin chromatin fibers condense to become distinct chromosomes?

Chromatin is composed of proteins and DNA.

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Chromatin fibers condense to become distinct chromosomes as a cell prepares to divide. When are the nucleoli visible? What are assembled here? Nucleoli are visible in a nondividing nucleus and in cells active in protein synthesis.

Within the nucleoli, proteins imported from the cytoplasm are assembled with rRNA into large and small subunits of ribosomes.

What is the function of ribosomes? What are their two components? Ribosomes are the cellular components that carry out protein synthesis.

Ap biology essay standards

Their two components are a large subunit and a small subunit. Ribosomes in any type of organism are all the same, but we distinguish between two types of ribosomes based on where they are found and the destination of the protein product made.

Complete this chart to demonstrate this concept. Location Suspended in the cytosol Product Type of Ribosome Free ribosomes Bound ribosomes Proteins that function within the cytosol Attached to the outside of the Proteins for insertion into endoplasmic reticulum or membranes nuclear envelope Concept 6.

List all the structures of the endomembrane system. The endoplasmic reticulum ER makes up more than half the total membrane system in many eukaryotic cells.You can use the resources below as you prepare for the AP Exam. Click here for details about the exam format..

Sample Questions. You’ll find sample multiple choice and free-response questions in the AP Biology Course and Exam Description .pdf/MB).. Sample Responses. Mark Scheme Bio 2 Trial Perak Biology Spm Paper.

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It includes a downloadable PDF of AP lausannecongress2018.com Ap biology essay standards; Search. Search for: Search. About This Site. This website is maintained by volunteers and community members of the Citizens Hose Company of Shortsville, New York.

2007 ap biology essay answer

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