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Q1. If relatively small carbonaceous chondrites from space were a significant source of Earth's original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth?
I. Carbonaceous chondrites must contain no D-amino acids.
II. Earth's early atmosphere must have had little free oxygen.
III. The chondrites must have arrived on Earth before 4.2 billion years ago.
IV. Earth's early atmosphere must have been dense enough to dramatically slow the chondrites before they impacted.
V. The chondrites must have impacted land, rather than a large body of water.
Q2. Oxygen can easily pass across the cell membrane. If the concentration inside cell is 9 percent and concentration outside the cell is 14 percent, what is going to happen? What is the process called? When will the net low in this direction stop?
Within the two groups defined by bone mass, smaller skeletons have bones with evidence of epiphyseal plates, but the larger skeletons have only a thin line where the epiphyseal plates should be. Give the age group and gender of the four individuals i..
When Purified Protein Derivative (PPD) isolated from Mycobacterium tuberculosis was injected into the skin of a patient, it caused an area of hardening 1 cm in diameter. How must this PPD test be interpreted? What caused the result.
Assume n-butylmalonate is added to an aerobic suspension of kidney cells using glucose exclusively as fuel. Predict, with description, the effect of this inhibitor on.
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If the ATP synthase molecules were randomly orientated so that about half faced the outside of the vesicle and half faced the inside, would you expect ATP to be synthesized.
What is the possibility that their next child will show both defects? Demonstrate the work.
A student designs an experiment to create an alcohol known as butanol. She mixes a species of Clostridium bacteria known to produce this alcohol as a by-product of its metabolism with a broth of water and glucose in excess, and incubates the mixture ..
How a biologist would explain how ability to run fast evolved in cheetahs, assume their ancestors would only run 20 miles per hour. How various total depurinations in your body each day.
In some cases the first gene in the linear sequence appears to be transcribed at a much higher rate than the second and subsequent genes (as in many but not all mRNAs contain the sequences encoded by gene 2 and beyond).
What phenotypic ratio would you get if you crossed a white mouse and a heterozygous brown mouse?
Which is easier to dispose of in a flock of chickens? A recessive allele for erect combs or a dominant allele for feathered legs. How various generations would it take.
Explain how one of these main concepts is connected to your own personal observations. Clearly describe two methodological problems associated with the way Scientists study the topic.
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