CLEP Biology Practice Test - nelnetsolutions.com

1 1 clep BiologyPractice organisms that are classified in the same fam-ily would not necessarily be classified in the same(A) kingdom(B) order(C) phylum(D) class(E) B cells are essential in the human immuneresponse because of their ability to(A) produce antibodies that can clump bacteriaor viruses together so that macrophages caningest them(B) attach directly to infected cells and punc-ture them with enzymes(C) cause antigen molecules, such as toxins, tosettle out of the blood plasma(D) engulf pathogens that they encounter in thebloodstream(E) clot open wounds so that bacteria cannotinvade the first vertebrates to live on land were the am-phibians, characterized by their ability to(A) lay eggs and by their rough, scaly skin(B) breathe through moist skin and walk onfour limbs(C) lay hard-shelled eggs on land(D) run quickly on land using muscular limbs(E) develop mammary glands for of an ancient reptile called Lystrosaurushave been found in Africa, India, and of the following best explains this distri-bution?

2 (A) They were able to move between continentsbefore the oceans filled.(B) The movement of India due to continentaldrift carried them from place to place.(C) These land areas were once next to eachother and have since drifted apart.(D) They were able to migrate over frozen seasduring Ice Ages.(E) Changes in climate forced them to migratefrom place to Mendel identified factors that could bepassed down from parents to offspring and thatresulted in the expression of certain characteris-tics. Today, we call Mendel s factors (A) linked genes(B) alleles(C) genotypes(D) phenotypes(E) homologous chromosomesTime 90 Minutes110 QuestionsFor each question below, choose the best answer from thechoices is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s2 clep decrease in the amount of carbon dioxidepresent in the air surrounding most plants wouldmost likely result in(A) the death of the plants(B) an increase in the production of sugarsthrough photosynthesis(C) a decrease in the output of the Calvin cycle(D) the breakdown of chlorophyll molecules inthe mesophyll layer(E) more nitrogen released into the air fromthe of a human ovum normally occursin the(A)

3 Vagina(B) ovary(C) uterus(D) seminiferous tubule(E) DNA strand has a base sequence of mRNA strand transcribed from this DNA is(A) ACUACG(B) CGTAGT(C) GCAUCA(D) GACUAC(E) may have sugar in their urine because(A) the proximal tubules of their nephronscannot reabsorb sugar efficiently(B) they do not produce enough insulin toabsorb sugar from the bloodstream(C) of deamination of proteins in their cells(D) poor filtration at the Bowman s capsules oftheir nephrons(E) they eat large amounts of to the cells lining the large intestinewould likely result in(A) diarrhea(B) decreased absorption of sugars and lipids(C) decreased filtration of proteins and aminoacids from the bloodstream(D) heartburn(E) area of this cell in which a chemiosmotic hy-drogen-ion gradient is used to produce ATP is rep-resented by the letter(A) A(B) C(C) F(D) G(E) HCLEP is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s3 clep following data is collected from placing threelizards of different species in separate closed tanksto measure their production of carbon dioxideover the course of 30 1 2 3 Weight in grams 12 8 24CO2 production (mL) of the following conclusions can be accu-rately drawn from this data?

4 (A) Lizards with smaller bodies consumed lessoxygen per gram of body weight thanlizards with larger bodies.(B) Each species of lizard has a unique rate ofrespiration.(C) Lizards in warmer climates produce morecarbon dioxide than lizards in colderclimates.(D) The 24-gram lizard consumes oxygen at arate double that of the 12-gram lizard.(E) The amount of carbon dioxide producedper gram of body weight for each species isthe involving the reduction of the bluedye DPIP, which loses its blue color and becomesclear as it absorbs electrons, have shown that thedye shows the greatest loss of color when in thepresence of chloroplasts(A) under bright, white light(B) in a dark box(C) that have been boiled before exposure tolight(D) exposed only to green light(E) in a sugar humans, carbon dioxide in the bloodstream ismainly transported from cells to lungs(A) as bicarbonate ion(B) as carbon dioxide gas bubbles within redblood cells(C) attached to hemoglobin(D) as carbonic acid(E)

5 As carbon dioxide gas bubbles within newly discovered organism has ribosomes thatcan be inhibited by the antibiotic streptomycin aswell as free-floating DNA not enclosed within anuclear membrane. This organism is most likely a(n)(A) virus(B) plant(C) fungus(D) protist(E) or around the cells of flowering plants, onewould expect to find all of the following EXCEPT(A) cell walls(B) mitochondria(C) centrioles(D) large, central vacuoles(E) best current evidence that modern-day birdsevolved from certain lineages of dinosaurs or otherreptiles may be supplied by the fact that(A) some dinosaurs, like birds, could fly(B) transitional fossils such as Archaeopteryxhave been discovered(C) birds and reptiles both exhibit some paren-tal care for their young(D) no birds have ever been found living duringthe same time period as dinosaurs(E)

6 Modern-day crocodiles are geneticallysimilar to certain lineages of modern-daybirdsCLEP is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s4 clep sodium-potassium pumps alonga neuron s axon would likely result in(A) an increased frequency of action potentials(B) a reversal in the movement of chloride ionsacross the axon membrane(C) action potentials that move from axon todendrite(D) a rapid decrease in the ability of the axon toconduct an action potential(E) the use of neurotransmitters to move theaction potential down the of the following conditions could resultin a decreased production of Substance C?(A) Addition of Substance B(B) Boiling Enzyme 1(C) Mixing Enzyme 1 with Enzyme 2(D) Addition of Enzyme 2(E) Removal of Substance graph shows the likely relationship be-tween a predator species and its prey over a six-year cycle?

7 (A)(B)(C)(D)(E) clep is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s5 clep of the following hormones is correctlylinked to its function in mammals?(A) regulates calcium in the blood-stream(B) Follicle simulating regulatessperm production(C) Gonadotropin-releasing causesrelease of thyroxine(D) production of secondary sexcharacteristics(E) increases blood glucose process of breaking food particles down intothe macromolecules that make them up is called(A) ingestion(B) cellular respiration(C) absorption(D) dehydration synthesis(E) a plant cell, the reactions of photosynthesis takeplace within the(A) mitochondria(B) chloroplast(C) cytoplasm(D) nucleus(E) plasma cannot grow very tall due to their lack of(A) specialized vascular tissues(B) a dominant gametophyte generation(C) chlorophyll(D) airborne spores(E) plants (A and B) of different species aregrowing together in the same pot.

8 When plant Ais removed and grown in a separate pot, it rapidlygrows much taller than it had been before, whileplant B dies. Which term describes the type ofrelationship that plants A and B most likely had?(A) Mutualism(B) Commensalism(C) Competition(D) Parasitism(E) PolymorphismCLEP is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s6 clep oxygen dissociation curve of human fetal he-moglobin differs significantly from that of themother, as shown below. What characteristic offetal hemoglobin might account for the fact thatfetal hemoglobin is able to pick up oxygen fromthe mother s blood at a significant distance fromthe mother s lungs?(A) The hemoglobin of the fetus cannot bindoxygen as strongly as the hemoglobin ofthe mother.

9 (B) Fetal hemoglobin binds oxygen at lowerpartial pressures and becomes fully satu-rated at lower partial pressures.(C) Fetal hemoglobin has iron unlike maternalhemoglobin.(D) Fetal hemoglobin needs higher partialpressures of oxygen than maternal hemo-globin in order to become fully saturatedwith oxygen.(E) There is more hemoglobin packed into thered blood cells of fetuses than into the redblood cells of plants (R) are dominant to green plants (r).Crossing homozygous red plants with homozy-gous green plants would result in which of thefollowing phenotype/genotype combinations?(A) red(B) red(C) green(D) red(E) red with green that bind to the surfaces of pathogensand help to destroy the pathogens are known as(A) antibodies(B) antigens(C) histamine(D) macrophages(E) share all of the following characteris-tics with other vertebrates EXCEPT(A) lungs(B) egg-laying ability(C) vertebrae(D) endothermy(E) mammary glandsCLEP is a registered trademark of the College Entrance Examination Board,which was not involved in the production of and does not endorse this 2004 Peterson s7 clep graph below shows the effectiveness of anenzyme at various temperatures ranging from 0degrees Celsius to 60 degrees Celsius.

10 What isthe best explanation for the behavior of this en-zyme at temperatures higher than approximately40 degrees Celsius?(A) The heat has caused the enzyme andsubstrate molecules to move more slowly.(B) The enzyme cannot get any more oxygen atwarmer temperatures and dies.(C) The enzyme becomes denatured and losesits 3-D structure.(D) The enzyme becomes more active due tothe increased availability of substratemolecules at higher temperatures.(E) A second enzyme had destroyed the activesites on the enzyme being , fats, and waxes are included among whichof the following classes of organic compounds?(A) Steroids(B) Proteins(C) Lipids(D) Carbohydrates(E) Fatty of the following eukaryotic organelles iscorrectly linked to its function?(A) Golgi packaging products forexport out of the cell(B) RNA synthesis(C) protein synthesis(D) site of photosynthesis(E) mitotic spindle of the following statements correctly ex-plains the flow of energy through a food web?