What is the role of DNA ligase in recombinant DNA technology?

A) DNA ligase cleaves the vector DNA.
B) DNA ligase makes the bacterial cell more permeable to vector.
C) DNA ligase forms the plasmids that are used as vectors.
D) DNA ligase seals DNA into an opening created by a restriction enzyme.
E) DNA ligase acts as molecular scissors, cutting DNA apart at specific locations.

To prepare a gelatin dessert, heat is used to disrupt hydrogen bonds holding the proteins together, thereby affecting their water solubility and causing them to interact with other proteins to form large, lattice-work structures. This is an example of ____, which is a(n) ____ process.

A) misfolding; reversible
B) metabolism; enzymatic
C) protein denaturation; irreversible
D) condensation; reversible
E) metabolism; irreversible

Damage to filiform papillae would disrupt a person's sense of taste for sweet substances.

In Atlantic codfish, pressure on the population by commercial fishing caused the size at sexual maturity to ____ and the age of sexual maturity to ____.

A) increase; decrease
B) increase; increase
C) increase; stay the same
D) decrease; increase
E) decrease; decrease

In a normal ECG, the deflection that is generated by ventricular repolarization is called the ________.

A) R wave
B) QRS wave
C) P wave
D) S wave
E) T wave

Most conifers are dioecious.