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Hair splits most easily along its fiber axis, whereas fingernails tend to split across the finger (sideways) rather than along it. What are the directions of the keratin fibrils in hair and in fingernails? Explain your answer in molecular terms.
It was discovered that the replication of the ends of chromosomes was a problem due to the structure of DNA and the properties of enzymes used in the replication process.
If a transcription factor causes DNA to bend, altering its structure by initiating a loop-like conformation, does this affect its electrophoretic mobility on a gel? If so, would the DNA:protein complex migrate at a slow rate?
A forty-two year old woman decides to lose weight on a diet prescribed by an anorexic friend. She loses about thirty pounds in 45 days, but her serum potassium level falls to 2.1 mmol/L.
Represent graphically the relation between melting temperature and the G-C content of DNA. Construct relations for dependence of melting temperature of a 30 bp DNA duplex on the G-C content.
All of the following illustrate why the bile acids are much better suited then cholesterol for use as emulsification agents for fats except.
Reduction often is referred to as the addition of hydrogens to a compound. It is more chemically correct to refer to reduction as the addition of electrons.
Assume you work with petunias and you have identified a single gene that causes their flowers to either be all pigmented (solid), or streaked with white.
Explain why in the evolution of ancestral eukaryotes, might it have been advantageous for separate organisms to become united into a single organism?
You are analyzing the structure of a gene and find it contains a restriction site for Pst1. This site is ~1000 bp away from another restriction site for Not1.
Which of the following is NOT a trait shared between green algae and land plants?
You decide to climb Mt Everest and someone tells you it takes 2-months. Estimate the number of times you would stop and explain why you need to acclimatize. Describe all the physical effects on your body and the dangers.
In order to map the distance between two linked genes, CC DD individuals were crossed to cc dd individuals. The F1 generation was then testcrossed to cc dd individuals.
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