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What is the chance that the male offspring will have the disability?
A female who is a carrier of an X-linked recessive disability produces an offspring with a normal male. What is the chance that the male offspring will have the disability?A . 0%B . 25%C . 50%D . 100%View AnswerAnswer: C Explanation: The situation presented is an Xx (female) crossed with...
True or False?
The heart will automatically stop if the SA node stops working: True or False?A . TrueB . FalseView AnswerAnswer: B Explanation: Although the SA node is the primary pacemaker of the heart, in the absence of its operation, the AV node will take over at a slower pace.
Which of the following yields the least ATP directly?
Which of the following yields the least ATP directly?A . TCA cycleB . oxidative phosphorylationC . glycolysisD . Beta OxidationView AnswerAnswer: A Explanation: The TCA cycle yields 2 GTPs (molecules that can be converted to ATP but are not ATP themselves), oxidative phosphorylation, which includes the ETC, can yield from...
Which of the following corresponds to the coding strand of the following mRNA?
Which of the following corresponds to the coding strand of the following mRNA? 5’-GUAACGUCA- 3’A . 5’-GTAACGTCA-3’B . 5’-CATTGCAGT-3’C . 5’-ACUGCAAUG- 3’D . 5’-TGACGTTAC- 3’View AnswerAnswer: A Explanation: The coding strand is NOT the complementary strand; it is the strand of DNA which is complementary to the strand from which...
How could lactic acid production and free fatty acid formation contribute to organelle dysfunction?
When blood flow to human tissue is interrupted, the lack of sufficient blood supply is called ischemia. If ischemia is not restored quickly, the affected tissue may undergo a process called infarction, which involves a series of chemical changes that damage the tissue. The lack of blood supply results in...
Which of the following occurs as a rise in intraocular pressure?
Which of the following occurs as a rise in intraocular pressure?A . inflammation of the corneaB . glaucomaC . cataractD . diabetic retinopathyView AnswerAnswer: B Explanation: Intraocular pressure (IOP) poses the greatest risk of causing glaucoma. A reduction in the flow and drainage of aqueous humor leads to a rise...
A virus contains all of the following except?
A virus contains all of the following except?A . mitochondriaB . RNAC . amino acidsD . DNAView AnswerAnswer: A Explanation: A virus is neither eukaryotic nor prokaryotic, but similar to prokaryotes, viruses lack organelles. They are composed primarily of nucleic acids, DNA and RNA, and proteins. Viruses lack mitochondria.
Where is the ETC located in bacteria?
Where is the ETC located in bacteria?A . mitochondriaB . Golgi apparatusC . peroxisomeD . plasma membraneView AnswerAnswer: D Explanation: Eukaryotes house the ETC in their mitochondria, but bacteria, which are prokaryotic, do not possess mitochondria or organelles. The ETC in prokaryotic bacteria is located along the cell membrane.
Which of the following molecules is thought to have acted as the first enzyme in early life on earth?
Which of the following molecules is thought to have acted as the first enzyme in early life on earth?A . ProteinB . RNAC . TriglyceridesD . PhospholipidsE . DNAView AnswerAnswer: B Explanation: Some RNA molecules in extant organisms have enzymatic activity; for example, the formation of peptide bonds on ribosomes...
Which is not a function of immunoglobins?
Which is not a function of immunoglobins?A . coagulationB . assist in phagocytosisC . attack pathogensD . labeling of pathogensView AnswerAnswer: C Explanation: Antibodies or immunoglobins perform all of the functions except for directly attacking pathogens. Leukocytes, or white blood cells, are responsible for attacking pathogens.
