λ represents the finite rate of population change over some time interval, often a year

λ = N1/N0

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#Id: 3615

#Unit 3. Fundamental Processes

The degeneracy of the code is not uniform. Whereas methionine and tryptophan have single codons, for example, three amino acids (Arg, Leu, Ser) have six codons, five amino acids have four, isoleucine has three, and nine amino acids have two.

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#Id: 8077

#Unit 13. Methods in Biology

CD spectra is used to

determine whether proteins are properly folded, 

estimate the fraction of the protein that is folded in either of the common secondary structures, and

monitor transitions between the folded and unfolded states.

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#Id: 96

#Unit 5. Developmental Biology

Cytoplasmic Determinants are molecules, often transcription factors that regulate gene expression that directs the cell along a particular path of maturation.

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#Id: 7307

#Unit 12. Applied Biology

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#Id: 8132

#Unit 1. Molecules and their Interaction Relevant to Biology

Lipids as pigments in plants and bird feathers.

Birds acquire the pigments that color their feathers red or yellow by eating plant materials that contain carotenoid pigments, such as canthaxanthin and zeaxanthin.

The differences in pigmentation between male and female birds are the result of differences in intestinal uptake and processing of carotenoids.