Plzzz help I’m being timed Question 4
During the process of transcription, which of the following events occurs directly after RNA polymerase recognizes the transcription start site of a gene?
A. A Free-floating nucleotide pairs up with the exposed DNA bases

B. A The DNA strand begins to unwind, separating the two strands.

C. A A complimentary RNA strand detaches itself from the DNA.

D. A The polymerase strings amino acids into a polypeptide.

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution