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What is the role of a nurse cell?
What is the role of a nurse cell?A . secrete testosteroneB . secrete spermC . nurture maturing red blood cellsD . activate sperm motilityView AnswerAnswer: C Explanation: Nurse cells aid in the maturation of red blood cells. They are macrophages that absorb immature red blood cells and facilitate the growth...
The breakdown of a disaccharide releases energy which is stored as ATP. This is an example of a(n):
The breakdown of a disaccharide releases energy which is stored as ATP. This is an example of a(n):A . Thermodynamic reactionB . Exothermic reactionC . Combination reactionD . Replacement reactionE . Endothermic reactionView AnswerAnswer: B Explanation: An exothermic reaction releases energy, whereas an endothermic reaction requires energy. The breakdown of...
A virulent phage is one which infects via:
A virulent phage is one which infects via:A . the lysogenic cycleB . phagocytosisC . immunoglobinsD . the lytic cycleView AnswerAnswer: D Explanation: Virulent phages use the lytic cycle to infect an organism. The lytic cycle is the process by which a phage DNA replicates itself via the host cell...
How many purple beans would result from a cross between two purple beans?
A cross between red bean (RR) and a blue bean (UU) yields all purple beans. How many purple beans would result from a cross between two purple beans?A . 0.25 of the offspringB . 0.50 of the offspringC . 0.75 of the offspringD . all of the offspringView AnswerAnswer: B...
Which of the following is necessary for the penetration of an egg?
Which of the following is necessary for the penetration of an egg?A . the flagellumB . mitochondriaC . acrosomeD . centrioleView AnswerAnswer: C Explanation: In order to penetrate an egg, a spermatozoon must bind with the exterior of the egg. This binding takes place by way of the acrosome reaction,...
Which of the following statements regarding energy production is true?
Which of the following statements regarding energy production is true?A . There is a net total of 4 ATP produced in glycolysis.B . The GTP made in the TCA cycle does not become ATD . The cell requires energy to move NADH into the mitochondria.E . The net gain of...
Which of the following is involved in hearing?
Which of the following is involved in hearing?A . microvilliB . ciliaC . hair folliclesD . hair cellsView AnswerAnswer: D Explanation: Hair cells lining the basilar membrane utilize mechanotransduction to detect, to amplify, and to convert mechanical sound waves into electrical signals. The resulting action potential then passes through the...
Which of the following provides the energy to create high energy electrons?
In photosynthesis, high-energy electrons move through electron transport chains to produce ATP and NADPH. Which of the following provides the energy to create high energy electrons?A . O2B . LightC . WaterD . NADP+E . NADHView AnswerAnswer: B Explanation: Electrons trapped by the chlorophyll P680 molecule in photosystem II are...
The structure in which microspores are produced:
The structure in which microspores are produced: A . 3B . 1C . 5D . 4E . 2View AnswerAnswer: E Explanation: Anthers produce microspores (the male gametophytes of flowering plants), which undergo meiosis to produce pollen grains.
What is the probability that they will have a child who has the same genotype as the father?
At two independently assorting loci, a man has the following genotype: GgHH. He marries a woman with the genotype ggHh. What is the probability that they will have a child who has the same genotype as the father?A . 0B . 1/2C . 1/4D . 1/8View AnswerAnswer: C Explanation: This...
