Why are the complementary base-pairing rules so important when a cell needs to copy its DNA?
A) The cells need both strands to be accurate because each strand codes for one half of the gene.
B) As long as there is one strand, a copy can be made by following the pairing rules.
C) Transcription cannot proceed unless the pairs are in the proper sequence.
D) Unless the bases pair up correctly, the DNA strand can break apart.
Answer: B
You might also like to view...
When an individual's immune system responds to an appropriate antigenic stimulus during the course of daily activities, this is called
A. naturally acquired passive immunity. B. artificially acquired passive immunity. C. artificially acquired active immunity. D. naturally acquired active immunity.
The most common inherited visual abnormality is ____
a. red-green color blindness b. astigmatism c. hyperopia d. myopia e. cataracts
Which description best explains the difference between orientation and navigation?
A. Orientation is the ability of the birds to change their direction in response to environmental clues. Navigation by birds can be achieved by using the sun or stars in order to determine the direction they should be flying. B. Orientation by birds can be achieved by using the sun or stars in order to determine the speed they should be flying. Navigation is the ability of the birds to change their direction in response to social clues. C. Orientation by birds can be achieved by using the sun or stars in order to determine the direction they should be flying. Navigation is the ability of the birds to change their direction in response to predator and prey abundance. D. Orientation by birds can be achieved by using the Earth's magnetic field in order to determine the direction they should be flying. Navigation is the ability of the birds to change their direction in response to environmental clues. E. Orientation by birds can be achieved by using the sun or stars in order to determine the direction they should be flying. Navigation is the ability of the birds to change their direction in response to environmental clues.
All of the following organisms are involved in carbon fixation EXCEPT
A) green and purple sulfur bacteria. B) cyanobacteria. C) lichens. D) algae. E) mycorrhizae.