Glycosylation of hydroxymethylcytosine residues protects phage T4 DNA from cleavage by bacterial restriction enzymes.
Answer the following statement true (T) or false (F)
True
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Some observations have suggested to researchers that substances associated with the extracellular matrix may be involved in cell migration. This has been observed with the cell marker CD44 on the surface of cancer cells and their ability to be separate from one another and to easily metastasize to other regions of the body. This is most likely due to the interaction of CD44 and
A) chondrotin sulfate. B) ICAMs. C) hyaluronate. D) fibronectins. E) elastin.
Why is it difficult for small isolated populations of animals to thrive?
a. There would be less genetic diversity. b. They would have difficulty finding a mate. c. They are vulnerable to disease. d. all of these
Predict whether or not each of the following substances can cross a biological membrane directly. Give a reason for each prediction
a. Nucleotides b. Na+ c. Steroid hormones d. Polar amino acids e. Water f. Oxygen g. Cl? What will be an ideal response?
The stramenopiles include water molds, diatoms, golden algae, and brown algae
____________________ Indicate whether the statement is true or false.