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Cell Biology Objectives and Worksheet 2: Cell-to-Cell and Signal Transduction
Name____________________
Objectives: Write out material in your course notebook.
Gene Regulation in Eukaryotes
The latest estimates are that a human cell, a eukaryotic cell, contains some 21,000 genes.
Some of these are expressed in all cells all the time. These so-called housekeeping genes are responsible for the routine metabolic functions (e.g. respiration) common to all cells.
Some are expressed as a cell enters a particular pathway of differentiation.
AP Biology: DNA Replication Lab
You will use simulations to demonstrate the structure and replication of DNA in this laboratory exercise. As you have studied, the genetic information for living organisms is stored in the structure of deoxyribose nucleic acid (DNA). Our DNA molecules carry the genetic code for inherited characteristics in the triplet-coded sequences of its nitrogen bases. Each time a cell divides, its DNA is precisely duplicated (DNA replication) so that the DNA of the cells formed is identical to that of the original cell.
Name __________________________________ Period ___________
AP Biology Lab 7: Genetics of Drosophila (virtual version)
Overview
In this lab you will be doing virtual genetic crosses of fruit flies (Drosophila melanogaster). You will learn how to collect data from F1 and F2 generations and analyze the results from a monohybrid, dihybrid, or sex-linked cross.
Objectives
Use chi-square to analyze data
Understand the life cycle of fruit flies
Mechanisms of Bacterial Genetic Recombination
Genetic Transfer
Genetic transfer is the mechanism by which DNA is transferred from a donar to a recipient.
In bacteria genetic transfer can happen three ways:
Transformation
Transduction
Conjugation
A recombination event must occur after transfer in order that the change in the genome be heritable (passed on to the next generation).
Transformation
After death or cell lyses, some bacteria release their DNA into the environment.
Action Research Assignment
Candidate?s Name: Sara Lepkofker
Proposal
(Must be approved by course instructor not later than Session 3)
Research Question: Which study strategy works best for next day recall of biology material; Cornell Notes taken from video lecture or Harvard Outline notes taken from similar material in student textbook?
Please provide citations for current research on the proposed research question. (At least three sources must be provided.)
THE CELL CYCLE-Chapter 12
? Ability to reproduce = one characteristic of living things
? Continuity of life based on the reproduction of cells
? Cell division functions in reproduction, growth, and repair? UNICELLULAR ORGANISMS use cell division for reproduction? MULTICELLULAR ORGANISMS use cell division to:? -repair/renew cells that die from normal wear and tear? -grow and develop from a single fertilized egg (zygote)? -reproduce asexually (EX: plants grow by cuttings)
Name __________________________________ Period ___________
AP Biology Lab 7: Genetics of Drosophila (virtual version)
Overview
In this lab you will be doing virtual genetic crosses of fruit flies (Drosophila melanogaster). You will learn how to collect data from F1 and F2 generations and analyze the results from a monohybrid, dihybrid, or sex-linked cross.
Objectives
Use chi-square to analyze data
Understand the life cycle of fruit flies
Water Potential (?)
Water potential (?) is a measure of water?s potential to do work. In order to do work, an object must be able to apply enough force to another object to cause displacement. In order for water to displace another object, water must be moving. The largest water potential any volume of water can have, if only standard atmospheric pressure is being applied to that volume of water, is defined as 0. This is the water potential for distilled water. Distilled water has the greatest potential to move, and thus displace another object.
Practice Problems ? Osmosis and Water potential
Use this key to answer all the problems below. If you choose B or C, rewrite the statement so that it is complete and true.
A = TRUE B = FALSE C = NOT ENOUGH INFORMATION
PROBLEM ONE: The initial molar concentration of the cytoplasm inside a cell is 2M and the cell is placed in a solution with a concentration of 2.5M.
Initially, free energy is greater inside the cell than outside
It is possible that this cell is already in equilibrium with its surroundings.
EXPLORING PROTEIN STRUCTURE
Discuss the properties of the following fibrous proteins in relation to their structure and function:
Collagen
Fibroin
Keratin
Some globular proteins, such as actin, can link together to form filaments. Discuss the importance of this property for cells.
Discuss how the microtubules of the cell cytoskeleton form. Relate this structure to the function of the cell cytoskeleton.
Facing the Facts of What Real Farms Consist of
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