The reactions of the Calvin cycle used to be referred to as the "dark reactions" of photosynthesis, implying that light was not required for this pathway to incorporate CO2 into carbohydrate
However, in the absence of light the Calvin cycle shuts down. Which of the
following parts of the Calvin cycle would be impacted FIRST by the absence of light energy?
A. the reduction of 3-phosphoglycerate and
the regeneration of RuBP
B. the carboxylation of RuBP and the
reduction of 3-phosphoglycerate
C. the carboxylation of RuBP and the
regeneration of RuBP
D. the carboxylation of RuBP and the
synthesis of hexose sugars
A
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Hepatitis B virus
A. is transmitted to newborns from chronic carrier mothers. B. has many chronic carriers. C. is principally transmitted by blood. D. transmission risks include shared needles, anal intercourse, and heterosexual intercourse. E. All of the choices are correct.
Which of the following methods is the most effective as birth control?
a. condoms b. diaphragms c. abstinence d. oral contraceptives e. vasectomy
The capillaries that wrap around each muscle fiber are located within the __________
Fill in the blank(s) with the appropriate word(s).
Genomic imprinting is generally due to the addition of methyl (-CH3 ) groups to C nucleotides and chemical histone changes to silence a given gene
If this depends on the sex of the parent who transmits the gene, which of the following must be true? A) Genes required for early development stages must not be imprinted. B) Methylation of this kind must occur more in males than in females. C) Methylation must be reversible in ovarian and testicular cells. D) The imprints are transmitted only to gamete-producing cells.