#Question id: 2116
#Section 2: General Biology
When a cell is in equilibrium with its environment, which of the following processes occurs for substances that can diffuse through the plasma membrane?
#Question id: 11806
#Section 6: Plant, Animal and Microbial Biotechnology
sap is translocated from areas of supply, called
sources, to areas of metabolism or storage, called sinks. Which of the
following statements about source and sink are TRUE?
a.) Sinks include any nonphotosynthetic organs of the
plant and organs that do not produce enough photosynthetic products to support
their own growth or storage needs
b.) Sources include exporting organs that are capable
of producing photosynthate in excess of their own needs
c.) During the growing season of the first year,
storage root is a sink, when it accumulates sugars received from the source
leaves. During the second growing season the same root becomes a source
d.) Roots, tubers, developing fruits, and immature
leaves, which must import carbohydrate for normal development, are all examples
of sources tissues
Find the correct combination of the source and sink pattern of translocation.
#Question id: 1836
#Section 2: General Biology
What is the feature that best uniquely describes NK cell activity against a virus-infected cell?
#Question id: 3687
#Section 3: Genetics, Cellular and Molecular Biology
As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?
#Question id: 15138
#Section 7: Recombinant DNA technology and Other Tools in Biotechnology