Which statement applies to facilitated diffusion?
a. It requires ATP.
b. It can involve either carrier proteins or channel proteins.
c. It is nonspecific with respect to the nature of the molecules being transported.
d. It is not dependent on a concentration gradient.
Ans: b. It can involve either carrier proteins or channel proteins.
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This is a nucleotide containing molecule that is commonly used to carry electrons in the cell
A. ADP B. ATP C. NAD+ D. pyruvic acid
These structures are required for chromosome replication; they protect the chromosome from being destroyed by dangerous DNAase enzymes, and they keep chromosomes from bonding to one another end to end.
A. telomeres B. nucleoproteins C. histones D. nucleotides
Carbon dioxide is the source of the electron that replace those lost by chloroplyll a in the photosystems
a. true b. false
Which statements about acid precipitation are accurate? (Check all that apply.)A) Acid rain is intermediate between point-source and diffuse pollution.B) Mercury is a pollutant that often accompanies acid precipitation.C) Acid precipitation is a severe problem in areas with soils having high buffering capacity.D) Acid precipitation can affect aquatic ecosystems.E) Acid precipitation can affect forests, weakening the trees and making them more susceptible to disease.
What will be an ideal response?