CLEP Natural Sciences Practice Test - nelnetsolutions.com

1 clep is a registered trademark of the College Entrance Examination Board, whichwas not involved in the production of and does not endorse this Natural SciencesPractice is a process in which plantsconvert(A) sugar into energy(B) ADP into ATP(C) fructose into glucose(D) carbon dioxide and water into sugar(E) water into and mitochondria have the follow-ing property in common.(A) Both are involved in protein synthesis(B) Both are involved in energy generation inthe cell(C) Both are involved in regulating ion con-centration in the cell(D) Both are involved in the transcription ofDNA into RNA(E) Their functions are not cellular respiration(A) glucose is synthesized from carbon dioxideand water(B) glucose is broken down into water andenergy is consumed(C) glucose is broken down and energy iscreated in the form of ATP(D)

2 Glycolysis occurs, leading to the formationof ethanol(E) pyruvic acid is converted into of the following is found in prokaryoticcells only?(A) DNA(B) Ribosomes(C) Nucleoid region(D) Golgi apparatus(E) are synthesized on(A) mitochondria(B) ribosomes(C) centrioles(D) RNA(E) the plasma consists of(A) DNA and proteins(B) RNA and proteins(C) RNA and enzymes(D) DNA and RNA(E) DNA first step in cell division is(A) division of the cytoplasm(B) alignment of the centrioles(C) duplication of the chromosomes(D) formation of mitotic spindles(E)

3 Dissolution of the nuclear membraneTime 90 Minutes120 QuestionsFor each question below, choose the best answer from thechoices 2004 Peterson'sCLEP is a registered trademark of the College Entrance Examination Board, whichwas not involved in the production of and does not endorse this Natural animal cell contains M chromosomes. Aftermitotic cell division, each daughter cell contains_____ chromosomes.(A) 2M(B) M/2(C) M(D) 3M(E) cells are characterized by(A) not exhibiting contact inhibition(B) excess cytoplasm(C) twice the number of chromosomes(D) half the number of chromosomes(E) controlled cell sequence from gene to protein in eukaryoticcells is(A) Golgi apparatus, RNA, DNA, ribosomes(B) DNA, RNA, ribosomes, Golgi apparatus(C) DNA, Golgi apparatus, RNA, ribosomes(D) RNA, ribosomes, DNA, Golgi apparatus(E) DNA, ribosomes, RNA, Golgi genetic code is(A)

4 Different for all living organisms(B) universal for all living organisms(C) the same only for some genes for someorganisms(D) the same for animals grouped in the samefamily(E) the same for animals in the same and RNA have all of the following in com-mon except(A) the base pairs G and C(B) double helix structure(C) nucleotide bases(D) phosphate groups(E) a 5 end and a 3 endQuestions 13 15 Mendel studied the following three traits:seed shape, flower position, and stem ShapeRound (R)Wrinkled (r)Flower PositionAxial (A)Terminal (a)Stem LengthTall (L)Dwarf (l) a plant that is heterozygous for the flower po-sition trait is fertilized with a plant that is ho-mozygous for the recessive flower position trait,what proportion of the offspring will be heterozy-gous for the trait?

5 (A) 0%(B) 25%(C) 50%(D) 75%(E) 100% a plant that is heterozygous for seed shape andstem length traits self-fertilizes, the proportion ofoffspring that will be homozygous for both traits is(A) 1/16(B) 1/4(C) 1/2(D) 3/4(E) 1/8 Copyright 2004 Peterson'sCLEP is a registered trademark of the College Entrance Examination Board, whichwas not involved in the production of and does not endorse this Natural with phenotype round seed shape and tallstem length are only fertilized with plants ofwrinkled seed shape and dwarf stem length, andthe same fertilization pattern is followed for thesuccessive generations.

6 Which of the followingstatements is true?(A) The frequencies of the dominant genes willincrease(B) The frequencies of the dominant genes willremain the same(C) The frequencies of the recessive genes willdecrease(D) The frequencies of the recessive genes willincrease(E) There will be no changes in the frequen-cies of dominant and recessive a red snap dragon flower is pollinated us-ing pollen from a white snap dragon, the follow-ing number of flowers and colors is observed:23 red, 20 white, 57 pink.

7 The genotype of thepink flowers is(A) RR(B) WW(C) RW(D) Cannot be determined from the informa-tion provided(E) More than one gene is with blood types A and B have an off-spring with type A blood. What are the probablegenotypes of the parents?(A) AO BB(B) AB BB(C) AO BO(D) AA BB(E) Cannot be determined from the informa-tion gene for a lethal disease is carried on the Xchromosome. What is the probability that a womanwho is a carrier passes this gene to her son?(A) 100 %(B) 75 %(C) 50 %(D) 25 %(E) 33 % of the following tissue types covers theoutside of the body and lines the internal organsand cavities?

8 (A) Epithelial(B) Connective(C) Skeletal muscle(D) Smooth muscle(E) of the following issue types that sends sig-nals throughout the body?(A) Epithelial(B) Connective(C) Skeletal muscle(D) Smooth muscle(E) of the following tissue types is responsiblefor contractions that move food along the intestines?(A) Epithelial(B) Connective(C) Skeletal muscle(D) Smooth muscle(E) consists of the following tissue typesexcept(A) white cells(B) red cells(C) platelets(D) collagen(E) plasmaCopyright 2004 Peterson'sCLEP is a registered trademark of the College Entrance Examination Board, whichwas not involved in the production of and does not endorse this Natural cell types have(A) the same DNA(B) different types of DNA(C) a small percentage of the total DNA(D)

9 Only the genes that code for its cell type(E) the same animal has radial symmetry?(A) Monkey(B) Tadpole(C) Starfish(D) Centipede(E) of the following would NOT be found inan animal with bilateral symmetry?(A) Dorsal side(B) Anterior(C) Posterior(D) 3 axes of symmetry(E) Ventral of the following is NOT a neurotrans-mitter?(A) Epinephrine(B) Serotonin(C) Dopamine(D) Caffeine(E) occur when(A) the circulatory system slows down(B) the immune system launches an inflamma-tory response(C) the immune system is not sensitive enoughto foreign invaders(D) the immune system recognizes a bacterium(E) nerve cells begin to fire a tryptophan-rich environment, it is noticedthe genes that code for proteins important in thebacteria s metabolic production of tryptophan areturned off.

10 The bacteria are not producing tryp-tophan. In this example, tryptophan(A) acts via a negative feedback loop(B) acts via a positive feedback loop(C) has a cascade effect(D) has no effect(E) is an the arrangement that lists the items fromsmallest to largest components.(A) Organ, organelle, tissue, cell(B) Tissue, cell, organ, organelle(C) Organelle, tissue, cell, organ(D) Cell, tissue, organ, organelle(E) Organelle, cell, tissue, organCopyright 2004 Peterson'sCLEP is a registered trademark of the College Entrance Examination Board, whichwas not involved in the production of and does not endorse this Natural the answer that correctly fills in the blanksfor the areas labeled 1, 2, and 3.