Which of the following is NOT one of the four nitrogen bases found in DNA. A: Adenine B: Thymine C: Melamine D: Cytosine

Exercise has no positive effects on the nervous system? true or falseu

When you have proper posture, your back is arched. a. true b. false

The virus genome and viral proteins are assembled into virions (virus particles) during ) the lytic cycle and the lysogenic cycle in all known host organismsb) the lysogenic cycle onlyc) the lytic cycle onlyd) the lytic cycle in all host organisms but the lysogenic cycle only in bacteria