Which of the following is not a function of the eukaryotic glycocalyx?
A. Adherence
B. Reception of chemical signals
C. Movement
D. Protection
Answer: C
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Two F+ E. coli strains are co-cultured in the same flask. One is Strr Thr+ and the other is Genr Thr?. The culture is then plated on minimal media that is supplemented with gentamycin only (not threonine) and a few colonies grow. What sort of genetic exchange is most likely occurring?
A) transformation B) conjugation C) transduction D) electroporation
When David Baltimore’s lab tried to determine how an RNA tumor virus replicates its genome, they
discovered that
a. these viruses can make DNA without an RNA template b. these viruses can make DNA after being treated with RNase c. these viruses can make more RNA genomes from their RNA genome d. an enzyme (reverse transcriptase) makes DNA from RNA e. an enzyme (reverse transcriptase) makes RNA from DNA
Focusing on an object requires the interaction of the ____ and the ____
a. ciliary muscles; lens b. ciliary muscles; cornea c. ciliary muscles; iris
d. iris; pupil e. cornea; pupil
The two major types of viruses are DNA and RNA viruses.
a. true b. false