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Why there are multiple origins of replication on eukaryotic DNA? a. To establish multiple copies of DNA simultaneously. b None of these is correct. c. To minimize errors in DNA replication. d. To reduce the time necessary for DNA replication
the stomach contains enzymes that aid in digestion, including proteases which digest proteins. Why dont these enzymes digest the stomach and small intestine, which are partially composed of protein?
You are a scientist, trying to work out the biological basis for learning and memory, and things havent been progressing so well lately. You decie its time to stop simply observing animals in mazes, and do some manipulitave experimentation.
An equilibrium mixture of propanoic acid, and its conjugate base has a pH of 4.87. Draw the form that predominates after H3O+ is removed from the equilibrium mixture. The pKa of propanoic acid is 4.87. Draw the strucural formula with any appropria..
Explain 4 mechanisms by which the integument helps to prevent infection. In other words, explain either specific actions the integument performs or characteristics of its structure.
Describe why the medium dyes diffuse through can affect the rate of diffusion. How does this relate to nutirent transport into cells?
What effect would the following mutations have on the expression of the enzyme coding sequences of the tryptophan operon. Select the letter on the right that describes the effect.
How many distinct molecular mechanisms might be responsible for converting a proto-oncogene into a potent oncogene?
Describe the ABO system of red blood cells classification and explain the significance of blood types.
Determine how many molecules of methylene blue dye are in a 256-fold dilution of a 0.00025 percent methylene blue dye stock solution?
While walking throughout a forest you notice that someone has carved his or her initials into the bark of a tree. The initials are exactly 1.5 meters from the ground. How far from grounds will the initials be next year and the year after that? Why? E..
When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across plasma membrane and various channel proteins close. What are these channels known as.
They isolated bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick. What other test do researchers require to perform to be absolutely sure that the bacterium is responsible for the dis..
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