The leucine zipper has a unique structure compared to the other transcription factors because it is a
dimer.
__________________ Indicate whether the statement is true or false.
T
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Surgery is an effective method of treating cancer when
A) a primary tumor has spread through the blood stream. B) a primary tumor is yet to invade healthy tissue. C) all rapidly dividing cells are targeted by the surgery. D) a patient has multiple tumors spread across his or her body.
Which of the following is a key feature of primates?
A. They have a brain that is large in relation to their body. B. They have mammary glands. C. They are endotherms. D. They give birth to live young.
The mutant fly in Figure 17-2 illustrates all of the following except:
a. the existence of homeotic genes in Drosophila.
b. the concept of nuclear equivalence.
c. mutations in genes affecting segment identity.
d. an altered phenotype due to a mutant allele.
e. a structure containing many nuclei residing in a common cytoplasm
The cell walls of bacteria are a copolymer of _______ and _______.
a. proteins; lipids b. proteins; polysaccharides c. polysaccharides; peptides d. cellulose; lignin