The E. coli chromosome is a circular double-stranded DNA, 4.6 × 106 in length. If the superhelical density (?) is
-0.05, what is the linking number for this supercoiled molecule?
A. 460,000
B. 438,095
C. 416,190
D. 219,050
E. 21,905
C
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What occurs during the antigen detection stage of the antibody-mediated immune response initiated by T cell activation?
a. Cytotoxic T cells destroy body cells that are infected with a pathogen b. Helper T cells activate an antigen-specific B cell to divide and secrete antibodies. c. A T cell displaying an antigen-specific T cell receptor (TCR) binds to the antigen on the surface of an antigen presenting cell. d. Helper T cells are activated by the TCR. e. A B cell degrades the pathogen and produces antigens.
What is the whitish looking feature below the eye in the lantern-eye fish pictured here?
When a carbohydrate is digested, what is the product?
A. energy B. simple sugars C. amino groups D. glycerol and fatty acids
The number of subunits in a DNA molecule is more important to its function than the sequence of these subunits
Indicate whether the statement is true or false