All of the following statements describe eukaryotic cells EXCEPT:
A. Their plasma membrane usually contain Sterols and carbohydrates
B. They have membrane-bound organelles (example include mitochondria and endoplasmic reticulum)
C. They have 80S ribosomes (70S in organelles)
D. They have usually a single circular chromosome
E. They may possess a cell wall but not of peptidoglycan
Ans: D. They have usually a single circular chromosome
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The compounds involved in phototropism are ____
a. phototropins b. gibberellins c. cytokinins d. phytoestrogens e. statoliths
Homologous chromosomes pair during _________
Fill in the blank(s) with the appropriate word(s).
Why are neocallimastigomycetes being studied for biofuel production?
A. They can ferment glucose into alcohol. B. They can release fermentable sugars from structural polysaccharides. C. They can generate methane. D. They provide energy to power fermentation. E. They can extract pollutants from biofuel starting materials.
In some genetically engineered tomatoes, fruit ripening was delayed by crippling the gene that produces which hormone?
A. auxin B. ethylene C. abscisic acid D. gibberellin E. cytokinin