4. After performing a Gram stain on a Gram negative bacteria, the specimen shows purple bacteria. Which of the following best explains why this occurred? A. Crystal violet was not used B. Decolorizer was not used C. The specimen was not heat-fixed D. Safranin was not used

5. Which of the following pieces of evidence could support the endosymbiotic theory if found in some eukaryotes? A. Presence of 80S ribosomes B. The presence of formylated methionine C. Genes that allow for multiple origins of replication D. Gene for expressing reverse transcriptase

6. A animal cell placed into a isotonic environment will: A. Not change noticeably B. Lyse C. Shrivel D. Will “puff up” and swell but not lyse

7. Which of the following correctly demonstrates the streaking method to obtain single colonies? Answer: 5. A researcher wishes to decrease the reactivity of an enzyme. Which of the following can she do? A. Increase temperature B. Add an allosteric activator C. Add an allosteric inhibitor D. Add a competitive activator

8. What kind of oxygen requirement does the culture in the figure MOST likely have? A. Microaerophile B. Facultative anaerobe C. Obligate aerobe D. Obligate anaerobe 7.

10. Which of the following could NOT explain why a streaked plate did not yield single colonies? A. The inoculation loop was flamed before streaking B. The plate was contaminated C. After the first quadrant was inoculated, all following quadrants were streaked from the first quadrant D. The inoculation loop was not flamed after the initial inoculation

11. You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is has a lipid portion, and heat stable. Based on these characteristics, how would you classify this toxin? A. superantigen B. endotoxin C. exotoxin D. A-B toxin

Review the osteoporosis. Make a personal assessment and formulate 8 or more strategies to improve the future health of your bone health.

What outputs of the light dependant reaction does not go into the light independant reaction. how are they produced and where do they go after being produced?

Cystic fibrosis is caused by a recessive allele. (Use "N" to stand for the normal, non-disease allele). If parents that are both heterozygous for cystic fibrosis have a child, what is the percent chance that the child will have the disease?

The best way to describe genetic diversity in humans is by describing it as a geographic component of ancestry. That is, human populations gradually change in their allele frequencies in many cases with high geographic precision. This actually makes any differentiation or split into groups very hard.

Is this statement true or false?

In otherwise normal, intact (not leaky), coupled mitochondria supplied with succinate and ADP, if you add the uncoupler CCCP:

a. What happens to electron- transport (works/stops)? Why?

b. What happens to oxygen consumption (works/stops)? Why?

c. What happens to proton pumping (works/stops)? Why?

d. What happens to ATP synthesis (works/stops)? Why?

Biotechnology (Online genetic testing services, GMOs in food debate)

What are the main arguments for and against using genetically modified foods and getting DNA testing online?

Match the vocabulary for Evolution: Species, Populations, Heritable Variation, Adaptations

A) Genetic differences in individuals within a population that can be pass on

B) Groups of the same species in the same geographic area

C) Traits that increase the individuals chance to survive

D) Similar looking organisms that can mate and produce viable offspring

Compare and Contrast infectious diseases, food security and environmental issues in terms of mortality in Mexico and the U.S.. How and why are these countries so different in terms of these topics.

Thanks.

whats the role of small G proteins,Ras? what's the role of small G protein, Rho, Rac and CDC42?

1.) What is the positive control in this experiment? Negative control? Why do you think this?

In otherwise normal, intact (not leaky), coupled mitochondria supplied with succinate and ADP, if you add OLIGOMYCIN:

a. What happens to electron- transport (works/stops)? Why?

b. What happens to oxygen consumption (works/stops)? Why?

c. What happens to proton pumping (works/stops)? Why?

d. What happens to ATP synthesis (works/stops)? Why?

The following is a strand of eukaryotic cDNA

DNA: 5'- catgtctdacagctggccgcca- 3'

a) convert the dna above to its complementary DNA strand (must labe the 5' or 3' ends)

b) dna is converted to mrna is process is called____?

c) convert this dna (5'- catgtctdacagctggccgcca- 3') to its mrna message

d) provide the protein sequence for this dna (5'- catgtctdacagctggccgcca- 3'_

remember this is done in a standard eukaryotic cell.

how to activate a small G protein? how to inactivate a small G protein?

Which of the following can contribute to new traits appearing in bacteria?

1) sexual reproduction

2) all of the other choices are correct

3)mistakes while DNA is copied

4)conjugation

5) two of the other choices are correct