As a scientist, you seek to prove that DNA is the hereditary macromolecule by replicating the Hershey-Chase experiment. You culture the lambda phage in heavy and light Cl (Cl-36 is heavy and radioactive - the most abundant is Cl-35, lighter and non-radioactive). You purify the phage from their growth media and infect the E. coli, where will you detect radioactivity?Select one:
a. Within the E. coli pellet as the DNA has entered the bacterial cells.
b. On the E. coli cell surface (or phage fraction), as part of the phage protein coat.
c. In the supernatent (free liquid) of your test tube
d. Both A and B
e. None of the above
Why is the answer none of the above? Why cant the radioactivity be detected?

Answers

Answer 1
Answer:

Answer:

The correct answer is option e. "None of the above".

Explanation:

The Hershey-Chase experiment helped to prove that DNA was the genetic material, by specifically labeling the DNA material of a bacteriophage with phosphorus-32. In this experiment the lambda phage is labeled with heavy and light Cl. CI-36, the one that is heavy and radioactive, corresponds to Chlorine-36. Chlorine is not an element found in DNA such as phosphorus, therefore lambda DNA will not be labeled and no radioactivity will be detected.


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Biological pest control involves _______.
3. Which of the following are necessary for a healthy diet?Minerals and Vitamin B Vitamins and Lipids Nutrients and Iron All of the above
Organisms can be classified in the same species by morphology and

Directions:1. Write Hypothesis (If, then statement)
2. 5 pieces of Food from your Thanksgiving Day meal
(Ideas: apple, corn on the cob, slice of turkey, carrot, whole potato, spoonful whip cream)
3. Fill Kitchen Sink, bathtub, or laundry tub with water (about half way up)
4. Write in data chart if you think each one will float.
5. Gently place each food (separately) in to the water
6. Record if did float or did not float.
7. Write Conclusion

Answers

The Conclusion y what did you learn or what you understand
Hope this helps! :)

Nutrients in food are carried through the body by the blood.
a. True
b. False T?

Answers

that is true, by capillaries :)

The tree of life is made up of which domains? Eubacteria , Archaea, and Eukarya Bacteria , Archaea, and Eukaryota Bacteria , Archaea, and Eukarya

Answers

The tree of life is made up of
 Archaea 
Eubacteria
Eukarya
Hope this helps:)
Archae, Eubacteria , eukarya . hope this helped

The various parts of the endomembrane system serve different functions in the cell. in this activity, you will identify the roles of each part of the endomembrane system.

Answers

the endomembrane system is very important for synthesizing, processing, and movement of lipids and proteins in the cell.
The smooth ER function is mainly used for lipid synthesizing and processing, while the rough ER function is for protein synthesizing

hope this helps

Final answer:

The endomembrane system consists of the nuclear envelope, ER, Golgi apparatus, lysosomes, vesicles, and plasma membrane. They collaborate to transport, package, and alter proteins and lipids. Components like mitochondria or chloroplasts are not part of the endomembrane system.

Explanation:

The endomembrane system in eukaryotic cells is composed of the nuclear envelope, the endoplasmic reticulum (ER), Golgi apparatus, lysosomes, vesicles, and the plasma membrane. These cellular components work together to perform several functions. Notably, they modify, package, tag, and transport proteins and lipids that form the membranes.

Starting with the nuclear envelope, it protects the contents of the nucleus by separating it from the cytoplasm. The endoplasmic reticulum synthesizes proteins and lipids. Golgi apparatus serves to further modify, sort, and package these proteins and lipids for transportation. lysosomes are involved in breaking down waste materials and cellular debris in the cell. Vesicles transport molecules around the cell. Finally, the plasma membrane controls the movement of substances in and out of the cell.

The endomembrane system does not include organelles like mitochondria or chloroplasts, as their membranes are not part of this system.

Learn more about the Endomembrane System here:

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The process in which an animal’s cells use oxygen and digested food molecules to release the energy in food is calleda. Breathing
b. cellular respiration
c. diffusion
d. gas exchange

Answers

We have been doing this in class recently and the answer is B cellular respiration.

Which statement describes how water is pulled up through the xylem to the leaves of the plant? As water exits the leaf, hydrogen bonding between water molecules pulls more water up from below. A As water exits the leaf, signals are sent to the roots to pump more water up to the leaves through the xylem by adhesion. B Evaporation from the leaf decreases the hydrogen bonds that form between the water molecules in the xylem, which helps the water molecules to be pulled up the xylem. C Evaporation of water from the leaf increases the hydrogen bonds that form between water molecules in the air, providing the energy for transport.

Answers

Final answer:

The movement of water in plants from the roots to the leaves is driven by transpiration, which creates a tension pulling water upwards. This process, as well as the water's cohesion and adhesion, and differences in water potential, is explained by the cohesion-tension theory.

Explanation:

The movement of water in plants, specifically from the roots to the leaves, is primarily driven by a process known as transpiration. Transpiration is the evaporation of water from the plant's leaf surfaces. This occurs at the leaf-atmosphere interface, creating a negative pressure or tension which effectively pulls up water from the roots, through the xylem vessels.

Adherence of water to the xylem cell walls, known as adhesion, and the attraction between water molecules themselves, known as cohesion, also play significant roles in this process. These factors permit the water to be held in the stem and leaf when transpiration stops at night as the stomata shut. Overall, this process of water movement is described by the cohesion-tension theory of sap ascent.

Water potential, at the same time, affects this process as it decreases from the roots to the top of the plant, meaning, there's a high water potential in the soil and roots and a low potential in the leaves, driving water upwards through the plant.

Learn more about Transpiration here:

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