The core histones are small, basic proteins that have a globular domain at the C-terminus and a long, extended conformation at the N-terminus. Which of the following is not true of the N-terminal "tail" of these histones?
(a) It is subject to covalent modifications.
(b) It extends out of the nucleosome core.
(c) It binds to DNA in a sequence-specific manner.
(d) It helps DNA pack tightly.
(c)
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In humans, hemophilia is caused by a recessive allele on the X chromosome. Suppose a man with hemophilia has children with a healthy woman whose mother had hemophilia. If an ultrasound test shows that their first child is a girl, what is the probability that she has hemophilia? (Enter the probability as a percent. Enter the number only without the percent sign. For example, enter 100% as 100 and enter 12.5% as 12.5 )
50 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain? Gather Content · What do you already know about X-linked inheritance? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
When the uterus begins to contract, it is almost time for the baby to be born.
Answer the following statement true (T) or false (F)
Animal cell centrosome MTOCs contain
A) condensins. B) cyclin-Cdk. C) centrioles. D) mitochondria. E) phragmoplasts.
How can it be determined whether a mutant that constitutively expresses the lac genes has a mutation that inactivates the repressor or a mutation in the operator?
What will be an ideal response?