Which of the following statements is FALSE with regard to DNA replication?
a. DNA synthesis proceeds in the 5’->3’ direction.
b. The strand being copied is read in the 5’->3’ direction.
c. Both strands replicate at the same time.
d. The position of the replication fork is constantly moving.
e. Two identical DNA polymerase molecules catalyze replication.
b
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A ______________ group consists of the most recent common ancestor and all of its descendants.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. A gene is any DNA sequence that is transcribed to any type of RNA. 2. In eukaryotic cells, a poly-A tail helps attach the ribosome to the mRNA molecule and may also determine how long the mRNA is retained within the cell. 3. Cystic fibrosis may be caused by a protein that does not fold correctly into its final form. 4. Because cells are very efficient in the processes that they carry out, very little energy is needed for the cell to make proteins. 5. In eukaryotic cells, an mRNA molecule can only be translated by one ribosome at a time.
The Hawthorne and apple maggot flies appear to have become reproductively isolated from each other
largely because:a. they occur on different sides of the Mississippi River. b. they have different mating behaviors. c. they occupy different parts of the habitat. d. they have adapted to two different hosts. e. they mate at different times of the day.
Which taxonomic groupings are in order from broadest to most narrow?
A) kingdom, species, genus B) class, family, species C) family, order, class D) phylum, kingdom, genus