Please explain very short and briefly.

1. Describe how ‘sister chromatids’ are different from ‘homologous chromosomes’.

2. Are diploid cells the only cells that can undergo mitosis? What about haploid or tetraploid cells?

3. Genetic variability is created during meiosis. Identify how this variability is created.

4. What is the most challenging aspect of learning about the processes of mitosis and meiosis?

1. What would be the power of magnification when using a microscope with a 10x ocular lens and a 45x objective lens?

• 10x

• 45x

• 55x

• 450x

• 35x
  2. A Petri dish containing isolated colonies of Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa would be described as being

• a pure culture.

• a mixed culture.

• a contaminated culture.

• an axenic culture.
  3. What type of media would be the best choice for isolating a bacterial colony

• nutrient broth

• motility media

• trypticase soy agar

• trypticase soy broth
  4. Mannitol salt agar contains (among other ingredients) extracts of animal tissue and mixed proteins, along with sodium chloride, which inhibits the growth of organisms other than those in the genus Staphylococcus. It also includes mannitol, which is fermented by Staphylococcus aureus, turning the medium yellow. Other species of Staphylococcus (which do not ferment mannitol) will still grow, but the medium remains red in color. Mannitol salt agar could be classified as
  

  Check All That Apply

• a solid medium.a solid medium.

• a liquid medium.a liquid medium.

• a differential medium.a differential medium.

• a selective medium.a selective medium.

• a complex medium.a complex medium.

• a defined medium.

7. Draw a concept map of integument repair using the following terms:

• Mast cells    
• Collagen fibers
• Macrophage                
• Fibroblasts
• Inflammatory response
• Scab
• Scar tissue
• Phagocytosis

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 18.7 % thymine and sample B contains 27.9 % thymine. Assume the organisms contain normal double‑stranded DNA and predict the composition of the other bases.

1. Discuss what is cell theory and why all living things have cells.

2. Discuss how cohesion and adhesion differ or compare.

3. Discuss how cells derived from pre-existing cells.

4. Discuss why does ice float on water? What would happen if ice was able to sink

Why do you think it is that quick weight loss does not lead to long term weight loss?

1. Define the Kingdom Plantae before and after the impact of Whittaker, Margulis, and Schwartz (1969-1988). How has the change in classification schemes impacted the study of biology? Which of these two views is more consistent with the view of Marine Botany? Why?

Assume that three capital letter alleles (A, B and C) control dark pigmentation because more melanin is produced. The lower-case alleles of these three genes (a, b & c) control light pigmentation because lower amounts of melanin are produced. The effect of these alleles is additive meaning a genotype with all capital alleles (AABBCC) has the maximum amount of melanin and very dark skin. A genotype with all small case alleles (aabbcc) has the lowest amount of melanin and very light skin. Each capital allele produces one unit of color, so that a wide range of intermediate skin colors are produced, depending on the number of capital alleles in the genotype.

What would be the possible skin colors (based upon total units of color) produced and their ratios by the following mating: Male - AaBbCc (3 units) X Female - aabbCc (1 unit).

Question 4

Select all that apply Which of the following are chemical property characteristics that could impact pharmacokinetics?

A. formulation

B. half life

C. patient age

D. interactions

E. disease

1. If the S phase of interphase occurred but G1 and G2 did not, would the cell still undergo cell division?A)Even though G1 and G2 phases did not occur and therefore protein synthesis did not occur in interphase, the cell would still divide. The enzymes, proteins and chemical messengers will be made in prophase to conduct the cell division process B)No, the cell would not divide since G1 and G2 did not occur and therefore the proteins, enzymes and chemical messengers needed to conduct the process of cell division would not have been synthesized. C) Yes, the cell would still divide since the S phase occurred making enough chromosomes for the new cells to be produced.

Explain what is meant by the following levels of protein structure: 1) primary structure; 2) secondary structure; 3) tertiary structure; and 4) quaternary structure. For secondary structure, name each type of secondary structure, and for each type, describe the structure and explain the roles of hydrogen bonding in that type of secondary structure. For tertiary structure, describe the role of hydrophobicity in tertiary structure; also, explain how hydrophobicity affects tertiary structure of a cytoplasmic protein and how it affects the tertiary structure of a membrane protein. For quaternary structure, give the name of a protein that has quaternary structure and describe, generally, its quaternary structure.

Choose either the mitochondria or the chloroplast to answer this question.

*Name the major reactions of cellular respiration or photosynthesis and give their location within the organelle

*which structures within this organelle is heavily folded? Why is it heavily folded (mention how this form relates to cellular respiration or photosynthesis)?

Define iPS cell and describe what these cells are/do/how they function

Describe how I might make an iPS cell that is useful for treating a skeletal muscle tear to speed up the repair process