- All Exams Instant Download
Which of the following is NOT a result of sympathetic stimulation?
Which of the following is NOT a result of sympathetic stimulation?A . increase in blood pressureB . increase of blood flow to intestinesC . increase in blood flow to the brainD . dilation of pupilsView AnswerAnswer: B Explanation: Sympathetic stimulation, associated with the fight-or-flight response, results in an increased blood...
In which of the following stages of embryo development are the three primary germ layers first present?
In which of the following stages of embryo development are the three primary germ layers first present?A . BlastulaB . ZygoteC . GastrulaD . CoelomateE . MorulaView AnswerAnswer: C Explanation: The gastrula is formed from the blastocyst, which contains a bilayered embryonic disc. One layer of this disc’s inner cell...
The synaptonemal complex is present in which of the following phases of the cell cycle?
The synaptonemal complex is present in which of the following phases of the cell cycle?A . Telophase of meiosis IB . Metaphase of meiosis IIC . Metaphase of meiosis ID . Metaphase of mitosisE . Telophase of meiosis IIView AnswerAnswer: A Explanation: The synaptonemal complex is the point of contact...
Cyanide is a poison that binds to the active site of the enzyme cytochrome c and prevents its activity. Cyanide is a(n):
Cyanide is a poison that binds to the active site of the enzyme cytochrome c and prevents its activity. Cyanide is a(n):A . Prosthetic groupB . CofactorC . Reverse regulatorD . CoenzymeE . InhibitorView AnswerAnswer: E Explanation: Enzyme inhibitors attach to an enzyme and block substrates from entering the active...
Which of the following is NOT the result of a viral infection?
Which of the following is NOT the result of a viral infection?A . genital wartsB . SyphilisC . AIDSD . the common coldView AnswerAnswer: B Explanation: Genital warts are caused by the Human papillomavirus. AIDS is a consequence of the Human Immunodeficiency Virus. The common cold is also a viral...
Energy for ATP synthesis is produced primarily by:
Energy for ATP synthesis is produced primarily by:A . NADHB . proton gradientC . ATP synthaseD . Na+View AnswerAnswer: B Explanation: Proton pumps located along the inner mitochondrial membrane enable the passage of H+ across a concentration gradient. These protons pass through ATP synthase in which an axel rotates to...
Which of the following organelles helps green plants synthesize organic compounds like starch in the presence of sunlight?
Which of the following organelles helps green plants synthesize organic compounds like starch in the presence of sunlight?A . MitochondriaB . ChloroplastC . RibosomesD . Golgi bodyView AnswerAnswer: B Explanation: Green plants, with the help of sunlight and in the presence of enzymes, synthesize organic compounds like starch from inorganic...
A population of 1000 individuals has 110 births and 10 deaths in a year. Its growth rate (r) is equal to:
A population of 1000 individuals has 110 births and 10 deaths in a year. Its growth rate (r) is equal to:A . 0.01 per yearB . 0.11 per yearC . 0.1 per yearD . 0.09 per yearE . 0.009 per yearView AnswerAnswer: C Explanation: The growth rate is equal to...
Which of the following is found in the plasma membrane of a cell?
Which of the following is found in the plasma membrane of a cell?A . phospholipidB . glycoproteinC . cholesterolD . all of the aboveView AnswerAnswer: D Explanation: The plasma membrane of a cell is composed of a phospholipid bilayer, a double layer of lipids combined with phosphate groups. The hydrophilic...
Darwin’s idea that evolution occurs by the gradual accumulation of small changes can be summarized as:
Darwin’s idea that evolution occurs by the gradual accumulation of small changes can be summarized as:A . Convergent evolutionB . Adaptive radiationC . Punctuated equilibriumD . Phyletic gradualismE . Sympatric speciationView AnswerAnswer: D Explanation: Phyletic gradualism is the view that evolution occurs at a more or less constant rate. Contrary...
