In Mendel’s hybridization experiments, the ratio of plants expressing dominant traits in the F2 generation was nearly 3:1, but never exactly the correct ratio. Ignoring any external confounding factors, what effect would you expect a larger sample size to have on the ratio of dominant to recessive traits expressed?
a. Larger sample sizes would have no effect on the ratio.
b. The results would drift further from the expected ratio.
c. The results would become more precise with more samples.
d. Larger sample sizes would increase the risk of cross-contamination.
c. The results would become more precise with more samples.
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Riboswitches regulate transcription, rather than translation, in cells.
Answer the following statement true (T) or false (F)
Select the correct statement about archaeal ribosomes.
A. Archaeal ribosomes are susceptible to antibiotics, similar to bacterial ribosomes. B. Archaeal ribosomes have subunits that are identical in shape and chemical components to those of bacteria. C. The chemical components of archaean ribosomes are more similar to those of eukaryotic ribosomes than to those of bacterial ribosomes. D. Archaeal ribosomal proteins are more similar to bacterial ribosomal proteins than to eukaryotic ribosomal proteins.
Which of the following is NOT photoautotrophic?
a. Cyanobacteria b. Green sulfur bacteria c. purple sulfur bacteria d. purple non-sulfur bacteria e. Cyanobacteria and purple sulfur bacteria
What is the role of actin in eukaryotic cells?
A. It forms the centromere that holds sister chromatids together. B. It forms the spindle that pulls chromosomes apart. C. It is necessary for the DNA to replicate. D. It provides strength in stretching and compression of a cell. E. It forms the structures inside flagella that allow the bending motion for cell motion (swimming).