Consider a cell in which one of the proteins involved in dna replication is altered. this alteration results in an increased occurrence of single-stranded dna breaks in the newly synthesized dna. which protein function is most likely nonfunctional in this situation?

a. the unwinding function of helicase
b. the fragment joining function of dna ligase
c. the winding stress relief function of topoisomerase
d. the proofreading function of dna polymerase
e. the strand separation function of single-stranded binding protein

B. The fragment joining function of DNA ligase

Explanation:

Replication of lagging strand occurs in a discontinuous manner by the formation of short pieces called Okazaki fragments. Okazaki fragments range in length from a few hundred to a few thousand nucleotides. The Okazaki fragments are joined together by DNA ligase enzyme. DNA ligase catalyzes the formation of a phosphodiester bond between a 3' hydroxyl group present at the end of one Okazaki fragment and a 5' phosphate at the end of another fragment.

In the absence of a DNA ligase enzyme, the replicated DNA would have single-stranded breaks as the Okazaki fragments would not have been joined together.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.