Irradiated mammalian cells usually stop dividing and arrest at a G1 checkpoint. Place the following events in the order in which they occur
A. production of p21
B. DNA damage
C. inhibition of cyclin–Cdk complexes
D. accumulation and activation of p53
B, D, A, C
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The distribution of animals and plants in
competition for scarce resources is likely to be a. clumped. b. random. c. near-uniform. d. constant. e. homogeneous
Cystic fibrosis is caused by the allele f, which is completely recessive to the normal dominant allele F. Consider a couple who both have the genotype Ff. What is the chance that their second child will develop cystic fibrosis?
A) 25% B) 50% C) 75% D) 100% E) It depends on which alleles were inherited by their first child.
In eukaryotic initiation, one will often see the sequence ACCAUGG as a translational start sequence. This sequence is known as the ________ sequence
A) Okazaki B) ETS (eukaryotic translational start) C) Kozak D) IRES (internal ribosome entry sequence) E) CIBS (complex initiation binding sequence)
What is the correct sequence of events in viral reproduction?
A. attachment, penetration, biosynthesis, maturation and release B. attachment, fusion, biosynthesis, maturation, and release C. penetration, attachment, integration, biosynthesis, maturation, release D. endocytosis, uncoating, maturation, and release