Questions
Discuss at least 3 of the causes that have led to all the sea turtles being...

Discuss at least 3 of the causes that have led to all the sea turtles being listed as endangered species. Your discussion should include the reasons why sea turtles are in decline, as well as steps being taken to help sea turtles recover from the cause

In: Biology

E.Coli DNa Pol III consists of a 5'3' polymerase activity and a 3'5' proofreading activity. lets...

E.Coli DNa Pol III consists of a 5'3' polymerase activity and a 3'5' proofreading activity. lets assume that a novel mutation results in a defective DNA Pol III, which can normally Polymerize nucleotides But can't proofread accurately. This error prone polymerase may result in one mistake per 100 base pairs. In order to prevent extensive damage to the genome, the micro must recruit a DNA repair mechanism. The microbe should be able to identify the newly synthesized strand of DNA and make the needed repairs. Using your knowledge of the DNA repair mechanisms answer the following questions.

a. which repair mechanism would be most suitable for this type of fixing?

b. how does the repair system recognize the parental strand with the correct code?

c. Which enzymes will help make the correction? Explain the process

In: Biology

The choices describe possible scenarios and outcomes from Gram staining with standard stains (e.g., crystal violet...

The choices describe possible scenarios and outcomes from Gram staining with standard stains (e.g., crystal violet and safranin). Match the scenario with the most likely outcome and explain why this occurs.

A. A gram-negative cell is stained, but the ethanol step is skipped.

i. The cell will probably appear pink, which will not correctly indicate its cell wall structure.

B. A gram-positive cell with a severely damaged cell wall is stained.

ii. The cell will appear pink.

C. A healthy gram-negative cell is stained.

iii. The cell will appear purple/violet.

D. A healthy gram-positive cell is stained.

iv. The cell will probably appear purple/violet, which will not correctly indicate its cell wall structure.

In: Biology

Describe how a temperate/lysogenic phage can contribute to disease, and give one example

Describe how a temperate/lysogenic phage can contribute to disease, and give one example

In: Biology

Catalase testing is one of several tests used to detect presence of an electron transport chain...

Catalase testing is one of several tests used to detect presence of an electron transport chain in a cell. Catalase is made by a cell to detoxify H2O2. How does presence of H2O2 relate to the presence of an electron transport chain?

In: Biology

Succinyl-CoA inhibits both citrate synthase and α-ketoglutarate dehydrogenase. How is succinyl-CoA able to inhibit both enzymes?

Succinyl-CoA inhibits both citrate synthase and α-ketoglutarate dehydrogenase. How is succinyl-CoA able to inhibit both enzymes?

In: Biology

Listen to the interview with Richard Rothstein on the National Public Radio Fresh Air segment. Then...

Listen to the interview with Richard Rothstein on the National Public Radio Fresh Air segment. Then answer the following questions regarding the content of the interview.

1. What are some ways that government policies instituted in the early to middle 20th century impacted the demographics of housing?

2. Discuss ways that these policies may play a role in susceptibility to disease to COVID-19 infection?

In: Biology

Chapter 7 Bacterial and Archaeal Growth 6. What are some of the environmental challenges faced by...

Chapter 7 Bacterial and Archaeal Growth

6. What are some of the environmental challenges faced by microorganisms and how do they cope with these challenges?

In: Biology

QUESTION 14 445 moles of NADH are produced by the Citric Acid Cycle (CAC). How many...

QUESTION 14

  1. 445 moles of NADH are produced by the Citric Acid Cycle (CAC). How many moles of glucose needed to be broken down during glycolysis in order to produce enough pyruvate for the CAC to produce this many moles of NADH?

    Note: Brock, a Biology of Microorganisms considers the synthesis of Acetyl-CoA to be part of the Citric Acid Cycle. This is different than what you may have learned in BIOL-151 where the Morris Book considers Acetyl Co-A Synthesis a seperate step. See page 89 of Brock for full details.

    Round your answer to one decimal place.

QUESTION 15

  1. If 82 moles of ATP are produced by glycolysis, how many moles of glucose were broken down?

    For every molecule of glucose broken down, 2 molecules of ATP are generated.

QUESTION 16

  1. NADH and FADH are produced by the Citric Acid Cycle (CAC) and these electron shuttles go on to the Electron Transport Chain (ETC). A mole of NADH will produce 3 moles of ATP from the ETC. A mole of FADH2 will produce 2 moles of ATP from the electron transport chain. A single mole of pyruvate will produce 4 moles of NADH and 1 mole of FADH2 from the CAC. Therefore, every  14 moles of ATP came from 1 mole of pyruvate.

    Given:

    The ETC produced 78 moles of ATP from the products of the CAC.

    Find:

    How many moles of pyruvate entered the CAC?

    Note: Brock, a Biology of Microorganisms considers the synthesis of Acetyl CoA from Pyruvate to be part of the Citric Acid Cycle. This is different than what you may have learned in BIOL-151 where the Morris Book considers Acetyl Co-A Synthesis a separate step. See page 89 of Brock for full details.

    Round your answer to one decimal place.

In: Biology

1. Write the difference between a prokaryotic and a Eukaryotic cell based on the following criteria:...

1. Write the difference between a prokaryotic and a Eukaryotic cell based on the following criteria:


Criteria    Prokaryotic cell Eukaryotic Cell

Examples    ---------------------- -------------------
Nucleus -------------------- ---------------------

DNA / Chromosome ----------- -------------------------
  
Membrane enclosed cell organelles -----------------    ------------------
  
Endomembrane system --------------- -------------------

2.  Compare Gram positive and Gram negative bacterial cell wall based on the following Criteria:
Criteria    Gram (+) Cell Wall Gram (-) Cell wall
Peptidoglycan content ------------- -------------------
Teichoic acid    --------------------------- --------------------------
Lipid rich outer membrane -----------------    -----------------------------
Gram stain ----------------------------    ----------------------------------

3. . Write the differences between Passive Transport and active transport.
   Passive Transport Active Transport
Does it need ATP? ---------------------------    -----------------------------------
What is the direction of transport ( driving force)? --------------------------    ------------------------------
  
Transport through phospholipid/ protein / both    ----------------------------    -----------------------------------------
  
Examples    ------------------------------------ -------------------------------------------------

In: Biology

How can we test the origin of life hypothesis “the Spontaneous Abiotic Origin”?

  • How can we test the origin of life hypothesis “the Spontaneous Abiotic Origin”?

In: Biology

which of the primate traits do you think that you could live without and why? How...

which of the primate traits do you think that you could live without and why? How would you psychologically and behaviorally compensate for the loss of this trait?

Your response should be at least one page ( I will give best ratings)

In: Biology

AA DD individuals were crossed to aa dd individuals. The F1 generation was then testcrossed to...

AA DD individuals were crossed to aa dd individuals. The F1 generation was then testcrossed to aa dd individuals. The resulting individuals had the following genotypes: 903 individuals with the genotype Aa Dd, 897 individuals with the genotype aa dd, 98 individuals with the genotype Aa dd, 102 individuals with the genotype aa Dd.

1. Are the genes (A and D) on the same chromosome or different chromosomes? (Calculate the expected number of progeny if they were on different chromosomes and compare.)

A. Same chromosomes

B. Different chromosomes

C. Can't be determined

2. If A and D are on the same chromosome, how far apart are they in Map Units. (Answer in a number - without units, if they are not on the same chromosome, answer 0).

In: Biology

what is the primary metabolite guaifenesin is metabolized by O-demethylase?

what is the primary metabolite guaifenesin is metabolized by O-demethylase?

In: Biology

Match each term below with its definition: a. Programmed cell death; it’s why you don’t      have...

Match each term below with its definition:

a. Programmed cell death; it’s why you don’t      have webbed fingers and toes.

b. This protein can stop the cell cycle and       initiate DNA repair if necessary.

c. Once the cell passes this, it is committed to      start preparations for cell division.

d. Causes cells to stop dividing when they       come in close contact with other cells.

e. An epidermal version helps repair damage     in the skin.

____ 6. cyclin

f. A cap on the end of a chromosome that      shortens as a cell ages.

____ 7. kinase

g. Occurs after metaphase, to make sure the      chromosomes are attached to the spindle.

____ 8. growth factor

h. An enzyme needed for the cell cycle to     continue.

____ 9. hormone

i. A protein whose levels increase and     decrease throughout the cell cycle.

____ 10. telomere

j. A chemical such as estrogen that can signal     cells to divide.

In: Biology