When heart muscles cells are deprived of oxygen, the heart still pumps for some time. What must the heart cells be able to do?
A. remove lactate from the blood
B. transform lactate back to pyruvate
C. continue aerobic metabolism when skeletal muscle cannot
D. remove oxygen from lactate
E. derive sufficient energy from fermentation
E. derive sufficient energy from fermentation
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The X and Y chromosomes ____
a. are responsible for autosomal recessive inheritance b. will lead to color-blindness in all carriers c. are found paired with all 22 autosomal chromosomes d. are responsible for albinism e. play major roles in determining the sex of an individual
A nucleotide is the building block of what macromolecule?
a. DNA b. protein c. lipid d. carbohydrate
Genetic map units represent
a. absolute physical distances between genes. b. locations of different alleles of a gene. c. the chromosome on which a given gene is located. d. the actual DNA sequence of a gene. e. relative positions of genes with respect to each other.
Homeostasis is maintained using negative feedback loops. Which part of a negative feedback loop detects conditions?
A. effector B. sensor C. response D. stimulus E. integrating center