At what stage is a mutation predicted to have the effect?
A) after the age of 60
B) during early embryonic development
C) after birth but before puberty
D) shortly after birth
E) after puberty
Answer: B
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Which of the following characteristics of DNA-dependent DNA synthesis is not the same for
DNA-dependent RNA synthesis? A. Synthesis requires a template. B. Initiation involves the recognition of a specific DNA sequence. C. Initiation of synthesis requires a primer. D. Synthesis is catalyzed in the 5' to 3' direction. E. All of the choices given are the same for both DNA and RNA synthesis.
Which statement best describes why the law of mass action explains the loading and unloading of oxygen in hemoglobin?
A) Oxygen has a greater mass than carbon dioxide and therefore can load more quickly than carbon dioxide. B) As oxygen levels in the pulmonary capillaries increase, more oxyhemoglobin is formed. Conversely, as oxygen levels in the systemic capillaries decrease, the reaction reverses and releases oxygen from hemoglobin. C) The mass of both carbon dioxide and oxygen is the same and therefore they exchange at the same rates D) As oxygen level rises, so does the pressure, which breaks the bonds of hemoglobin thereby releasing hemoglobin to the tissues. E) As oxygen levels in the pulmonary capillaries decrease, more carbaminohemoglobin is formed due to the concentration of carbon dioxide.
According to Chargaff’s rules:a
the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules. b. the adenine content in any DNA molecule is always equal to the thymine content. c. the adenine content in any DNA molecule is always greater than the thymine content. d. the guanine content in any DNA molecule is always less than the cytosine content. e. there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.
A hydrogen bond _________.
Fill in the blank(s) with the appropriate word(s).