Wilting is counteracted by
a. turgor pressure.
b. osmotic pressure.
c. concentration gradients.
d. diffusion.
e. metabolic pressure within a cell.
Answer: a
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Complete the following sentence. An intron is _______________________
A. a protein that is clipped out post- translationally B. RNA that is removed during the processing of an RNA molecule and remains inside the nucleus C. part of an intact, mature mRNA that leaves the nucleus D. a transfer RNA that binds to the codon E. a series of amino acids at the end of a new polypeptide that directs transcription to the ER
Answer the following statements true (T) or false (F)
1. RNA polymerase can bind to the promoter region of the DNA even when the lac repressor is bound to the operator site. 2. Both eukaryotes and prokaryotes require a promoter region for gene transcription. 3. A cis-effect is a form of gene regulation that can occur between two DNA segments that are not physically adjacent. 4. Eukaryotic genes are almost always organized in groups, similar to operons in prokaryotes.
In corn, having ligules (L) is dominant to liguleless (l), and green leaves (G) is dominant to white leaves (g). If a pure-breeding plant that is liguleless and has green leaves is crossed to a pure-breeding plant with white leaves and ligules, predict the genotypes and phenotypes of the F1.
A) LL GG, green and ligules B) Ll GG, green and ligules C) Ll Gg, green and ligules D) ll gg, white and liguleless E) Ll gg, green and liguleless
What is a correct description of metaphase during mitosis?
What will be an ideal response?