You are interested in developing an inhibitor for the estrogen receptor. You have identified a molecule that is small and hydrophilic. In a test tube, this inhibitor binds tightly to the estrogen receptor, and inhibits the interaction of the receptor with estrogen. Do you think that this molecule will be an effective inhibitor of the estrogen receptor in cells?
A. No, because it will need to bind to the DNA-binding domain to act as an inhibitor.
B. No, because it is hydrophilic.
C. Yes, because it can prevent estrogen binding.
D. Yes, because it is small.
Answer: B
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What is the difference between dideoxyribonucleotides (ddNTP) used in Sanger sequencing and the
deoxyribonucleotides (dNTP) normally found in DNA?
a. ddNTPs have a 3' H rather than OH b. dNTPs have a 3' H rather than OH c. ddNTPs have a 5' OH rather than H d. dNTPs have a 5' OH rather than H e. ddNTPs have a 3' OOH rather than OH
If you wanted to calculate the frequencies of the two different alleles for a particular gene in a
population, what data would you have to gather and how would you use it?
What will be an ideal response?Which statement is correct about how carbon dioxide is carried in the bloodstream?
A. Carbon dioxide enters the bloodstream from the atmosphere. It then combines with water to form carbonic acid but most of it is carried in the form of bicarbonate. B. Carbon dioxide enters the bloodstream from the tissues. It then combines with hydrogen ions to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin. C. Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin in the bloodstream. D. Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate. E. Carbon dioxide enters the bloodstream from the atmosphere. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate.
Recently, the bones (not fossils) of a possible new species of humans (in the genus Homo) have been found on an island in Indonesia (an island nation southeast of Asia). Using radiometric dating, scientists can show that these people were alive as
recently as 17,000 years ago. According to the information in this chapter, why do you think they probably used tools? What will be an ideal response?