Cells contain the molecule GTP (guanosine triphosphate). Would this molecule be useful as an energy carrier (similar to ATP)?
a. No, because it does not contain the adenosine necessary for storing energy.
b. No, because it contains fewer phosphates than ATP.
c. Yes, because it contains a nitrogenous base just like ATP.
d. Yes, because it contains the same number of phosphates as does ATP.
Ans: d. Yes, because it contains the same number of phosphates as does ATP.
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Based on their experiment with T2 bacteriophages, Hershey and Chase concluded that
A. DNA replication is semiconservative. B. the phage coat contains the genetic material. C. DNA functions as the genetic material. D. A always pairs with T and G always pairs with C. E. virulent bacteria can transform nonvirulent bacteria.
During the absolute refractory period, the axon membrane cannot transmit another action potential
____________________ Indicate whether the statement is true or false.
Which type of plant hormone generally acts as a growth inhibitor?
A) auxins B) gibberellins C) cytokinins D) abscisic acid (ABA)
Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene-an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). The allele for long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l). An individual who is heterozygous for eyelash length would produce which of the following gametes?
A. Half of the gametes would have the L allele and half of the gametes would have the l allele. B. All gametes would have the l allele. C. The proportion of gametes receiving each allele would be random; the process of meiosis is very disorganized and chromosomes are not separated in an ordered fashion. D. All gametes would have the L allele. E. None of the gametes would have the eyelash gene; gametes do not have eyelashes.