Nitrogen fixation and nitrification are directly important processes for:
a. heterotrophic animals.
b. heterotrophic bacteria.
c. autotrophic organisms.
d. fungi.
e. viruses.
C
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Analysis of the nucleotide sequence of the genome of Chlamydia trachomatis suggests that it may be able to synthesize some of its own ATP.
Answer the following statement true (T) or false (F)
During the denaturation step of PCR, ____ bonds are broken when DNA is heated
a. hydrogen b. double-stranded c. ionic d. metallic e. covalent
Refer to Figure 51-2. The nervous system will develop from which structure?
a. 1 b. 2 c. 3 d. 4 e. a structure not numbered in this figure
A scientist wishes to develop an antimicrobial agent that specifically targets replication elongation in Escherichia coli without interfering with proteins that catalyze other replication processes. Which of the following experimental designs is most appropriate for the scientist to explore?
A. Modify an existing antibiotic to act as a competitive inhibitor of DNA polymerase I B. Design a drug that modifies the structural configuration of DNA at the oriC locus C. Create a novel protein that acts as a competitive inhibitor of the DNA ligase binding site D. Develop a molecule that interferes with the DNA-binding ability of DNA polymerase III core enzyme