In adaptive immunity, pathogen specific receptors are produced in large numbers only after exposure to the pathogen or its products

Indicate whether the statement is true or false.


Answer: TRUE

Biology & Microbiology

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Using visual observation of phenotypes to identify allele frequency rarely works because:

A. most alleles are recessive and will not produce a visible phenotype. B. phenotype is not due to the alleles. C. multiple genes may control the phenotype. D. visual phenotypes are rare. E. phenotype is not an indication of genotype.

Biology & Microbiology

Identifying candidates for a disease gene by positional cloning depends on distinguishing DNA markers that are close to the disease gene from markers that are far away. When the disease gene is close to a marker, there will be

A) a high number of mutations in the intervening DNA. B) a low rate of recombination between the disease gene and the marker. C) many alleles at the marker locus. D) a high chance of locus heterogeneity.

Biology & Microbiology

When an enzyme breaks the bond between the second and third phosphate group on ATP ____

a. energy is released b. ATP is produced c. glucose is produced d. cellular work decreases

e. metabolism decreases

Biology & Microbiology

Poorly drained soils or soils saturated by water tend to be yellowish-brown or reddish

Indicate whether the statement is true or false

Biology & Microbiology