Which of the following bacteria play a role in infertility in cattle?
A. Campylobacter fetus subsp. venerealis
B. Campylobacter fetus subsp. fetus
C. Campylobacter rectus
D. Campylobacter concisus
Ans: A. Campylobacter fetus subsp. venerealis
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The ? helix contains ______________ amino acids residues per turn. One full turn of the ? helix is ______________ long
A. 5.4, 3.6 Å B. 36, 54 Å C. 3.6, 5.4 Å D. 5.4, 1.5 Å E. 3.6, 1.5 Å
Which of the following terms refers to the change in
relative day length? a. phytoerythrin b. phototropism c. photorhythmic d. photochrome e. photoperiodism
In recombinant DNA techniques, the gaps in the paired DNA fragments are closed by ____
a. restriction enzymes b. DNA ligase c. DNA polymerase d. DNA replicase e. reverse transcriptase
What type of tissue is bone and cartilage?
A. connective tissue B. muscle tissue C. nervous tissue D. epithelial tissue