BSC1005 ProctorU MIDTERM MDC: Questions & Answers, Exams of Biology

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BSC1005 ProctorU MIDTERM MDC

2023-2024. Questions & Correct,

Verified Answers. Graded A

___is the source of the oxygen gas released by a photosystem. A) NADPH B) H2O C) Chlorophyll a D) CO E) C6H12O6 - ANSB) H2O A charge in the genetic frequency of a population over time describes ________. - ANSevolution A fat that is hydrogenated is - ANSmore solid A friend of yours appears to have put on a lot of muscle very quickly. At the same time, you notice that your friend seems to have a lot of mood swings and appears depressed. It is reasonable for you to suspect that your friend has begun to take ______. - ANSan anabolic steroid A glycerol with three fatty acids attached is referred to as a _______. - ANSfat

A horse eating some hay is an example of - ANSa consumer eating a producer A hypothesis is a(n) _________. - ANSObservation Aerobic cellular respiration generates about ________ ATP from one glucose. - ANSless than 50 All atoms of an element have the same number of _____________. - ANSProtons An atom's _____ are found in its nucleus - ANSneutrons and protons Anaerobic respiration produces a maximum of _____ ATP per glucose - ANS Carbohydrates typically include ______. A) an NH2 group B) C, H, and O atoms C) a hydrocarbon chain D) a PO4 group - ANSB) C, H, and O atoms Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which of the following processes could be responsible for its secretion? - ANSexocytosis Diffusion - ANSProceeds until equilibrium is reached

How does RNA differ from DNA? - ANSRNA contains uracil; DNA contains thymine How many times must the Calvin cycle turn for the plant cell to be able to produce one molecule of glucose? - ANSSix Human muscle cells use lactic acid fermentation to ________. A. produce ATP without O B. produce more ATP than is possible through complete aerobic respiration C. produce ATP using the electron transport chain D. regenerate NADH - ANSA. produce ATP without O If one strand of a DNA double helix has the sequence AGTACTG, what will be the sequence of the other strand? - ANSTCATGAC In a hypotonic solution, a plant cell will - ANSbecome turgid In a plant cell, DNA may be found - ANSin the nucleus, mitochondria, and chloroplasts In a scientific experiment, the control group ______. - ANSserves as a basis of comparison with the experimental group in cellular respiration, most ATP is produced directly as a result of _______. - ANSthe movement of hydrogen ions across the inner mitochondrial membrane

In photosynthesis, redox reactions ultimately transfer electrons from ________ to ______ - ANSH2O... CO In plants, reduction of NADP+ occurs during _____. - ANSboth photosynthesis and respiration Information is transferred from the nucleus to ribosomes via - ANSmRNA Nitrogen has an atomic number of 7; therefore, it has ______ electrons in its outermost electron shell. - ANS Nucleic acids are polymers of _______ monomers. - ANSnucleotide Osmosis can be defined as - ANSdiffusion of water People have long speculated about whether life exists on Mars. Scientists have evidence that on Mars, _________. - ANSliquid water has existed in the past Plant cells, unlike animal cells, are characterized by the presence of a - ANScell wall and central vacuole Relative to a pH of 6, a pH of 4 has a _______. - ANS100 times higher H+ concentration

The final electron acceptor of aerobic respiration is - ANSoxygen The region of an enzyme to which a substrate binds is called the ________ site. - ANSactive The sum total of all the chemical reactions that occur in organisms is called - ANSmetabolism The tendency of molecules of the same kind to stick together is called ____. - ANScohesion The ultimate source of the energy in food is ______. A) the sun B) producers C) ATP D) consumers - ANSA) the sun What accounts for the different breeds of domesticated dogs? - ANSartificial selection What are grana? A) thick fluids inside chloroplasts B) convolutions of the inner chloroplast membrane C) stacks of membranous sacs D) pigments found in chloroplasts - ANSC) stacks of membranous sacs

What are two main processes that ecosystems depend upon? - ANSnutrient cycling and energy flow. What is energy? - ANSthe capacity to cause change What is responsible for the yellow-orange coloration of leaves in the fall? - ANScarotenoids What is the name given to the reaction that breaks apart polymers? - ANSHydrolysis What must pyruvic acid converted to before it can enter the citric acid cycle - ANSAcetyl CoA What structures move proteins from the ER to the Golgi apparatus? - ANStransport vesicles What waste product do yeast produce under anaerobic conditions? - ANSethyl alcohol when mixed with water, phospholipids spontaneously form membranes because they - ANShave hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails that avoid water.

Which of the following is an autotroph? - ANSpine tree Which of the following is the correct sequence of stages in cellular respiration? - ANSglycolysis, citric acid cycle, electron transport chain Which of the following statements best describes the relationship between photosynthesis and respiration? - ANSPhotosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules. Which of the following statements is correct about diffusion - ANSIt is passive process in which molecules move from a region of higher concentration to a region of lower concentration Which of the following statements is true concerning Figure 10.3? - ANSit represents cell processes involved in C4 photosynthesis Which of the following statements is true? - ANSOxidation is the loss of electrons; reduction is the gain of electrons. Which of the following structures can perform all the activities required for life? A) DNA molecules B) cells C) organelles D) nuclei - ANSB) cells

Which of the following structures manufactures the components of ribosomes? - ANSNucleolus Which of the following types of molecules are the major structural components of the cellmembrane? - ANSphospholipids and proteins which theory states that all living things are composed of cells - ANSCell theory Why (if you are careful) are you able to float a needle on the surface of water - ANSThe surface tension that is a result of water's cohesive properties makes this possible.