BIOLOGY E - Weebly



BIOLOGY E.O.C. PRACTICE TEST 2

|Question 1 of 50 |

|During DNA replication, which of the following segments would be complementary to the original DNA segment of CCTAAT? |

|CGATTA |

|GGUTTU |

|GGATTA |

|GGAUUA |

|Question 2 of 50 |

|Which of the strands below is the complement to the segment GCATCCGA of a DNA molecule? |

|CCTAGGCT |

|GCATCCGA |

|CGUAGGCU |

|CGTAGGCT |

|Question 3 of 50 |

|What type of RNA is responsible for bringing amino acids to the ribosome for protein synthesis? |

|messenger RNA |

|transfer RNA |

|ribosomal RNA |

|mitochondrial RNA |

|Question 4 of 50 |

|The messenger RNA will carry the DNA's instructions out of the nucleus to which of the following? |

|vacuole |

|mitochondria |

|chloroplast |

|ribosome |

|Question 5 of 50 |

|To determine the molecular sequence of a gene for a protein, which molecule should be analyzed? |

|tRNA |

|ATP |

|DNA |

|rRNA |

|Question 6 of 50 |

|If a portion of a DNA strand has the base sequence TACGCA, what will be the base sequence of the mRNA strand transcribed? |

|TACGCA |

|UACGCA |

|AUGCGU -ATGCGT |

|Question 7 of 50 |

|Transcription of the DNA sequence below: AAGCTGGGA would MOST DIRECTLY result in which of the following: |

|a sequence of three amino acids, linked by peptide bonds |

|a DNA strand with the base sequence TTCGACCCT |

|a mRNA strand with the sequence TTCGACCCT |

|a mRNA strand with the sequence UUCGACCCU |

|Question 8 of 50 |

|What is the purpose of transfer RNA? |

|It unzips the double helix so transcription can begin. |

|It retrieves amino acids from the cytoplasm for protein construction. |

|It carries genetic information to the ribosomes. |

|It produces a complementary copy of a strand of DNA. |

|Question 9 of 50 |

|Which statement is true regarding asexual reproduction as a method of producing offspring? |

|common among mammals |

|not a method used by plants |

|produces offspring that are genetically identical |

|limited to unicellular organisms |

|Question 10 of 50 |

|Which process is responsible for the diversity of plants within a species? |

|cross-pollination |

|transpiration |

|self-fertilization |

|photosynthesis |

|Question 11 of 50 |

|Which of the following demonstrates the MOST SIGNIFICANT differnece between asexual and sexual reproduction? |

|The chromosome number is reduced during asexual reproduction. |

|The number of chromosomes is reduced during sexual reproduction. |

|The appearance of the organism is changed as a result of asexual reproduction. |

|There is genetic variation as a result of sexual reproduction |

|Question 12 of 50 |

|What is true about any two normal gametes from a human male parent? |

|Each has a diploid number of chromosomes. |

|They can combine to form a new organism. |

|Their chromosomes are exactly the same. |

|They have the same number of chromosomes |

|Question 13 of 50 |

|USE THE FOLLOWING INFORMATION TO ANSWER THE QUESTION: As scientists have developed more productive crop varieties, farmers have switched from growing many traditional |

|varieties to new high-yield varieties. For example, in India, the 10,000 varieties of rice once grown have been reduced to 10 major ones for most of the rice crop. Besides |

|the varieties of rice being reduced, what else is reduced by this practice? |

|types of soil nutrients |

|the gene pool for rice |

|food chains that include rice |

|human dietary choices |

|Question 14 of 50 |

|A cell has undergone a meiotic division cycle. In order for the cell to achieve a diploid state, what must occur? |

|cleavage |

|fertilization |

|meiosis |

|mitosis |

|Question 15 of 50 |

|USE THE FOLLOWING INFORMATION TO ANSWER THE QUESTION: As scientists have developed more productive crop varieties, farmers have switched from growing many traditional |

|varieties to new high-yield varieties. For example, in India, the 10,000 varieties of rice once grown have been reduced to 10 major ones for most of the rice crop. Why is |

|this practice of reducing the varieties of a crop dangerous? |

|It makes the overall crop more susceptible to pests or disease. |

|It reduces the variety of crops available for human diets. |

|It requires a larger investment than small farmers can make. |

|It could reduce or cause the extinction of some predatory insects. |

|Question 16 of 50 |

|Why is this practice of reducing the varieties of a crop dangerous? |

|It makes the overall crop more susceptible to pests or disease. |

|It reduces the variety of crops available for human diets. |

|It requires a larger investment than small farmers can make. |

|It could reduce or cause the extinction of some predatory insects. |

|Question 17 of 50 |

|A human skin cell contains 46 chromosomes. How many chromosomes are present in a human sperm cell? |

|23 |

|46 |

|92 |

|138 |

| |

| |

| |

| |

|Question 18 of 50 |

|Some traits are determined by more than two alleles. If aabbcc is crossed with AABBCC, what would be the genotype of the offspring? |

|AaBbCc |

|AABBCC |

|aabbcc |

|aaAAbbBBccCC |

|Question 19 of 50 |

|In a genetics laboratory, two heterozygous tall plants are crossed. If tall is dominant over short, what are the expected phenotypic results? |

|100% tall |

|75% tall, 25% short |

|50% tall, 50% short |

|25% tall, 75% short |

|Question 20 of 50 |

|Mr. Jones has blood type A and Mrs. Jones has blood type AB. What is the probability that they will have a child with blood type A if both of Mr. Jones's parents were AB? |

|0% |

|25% |

|50% |

|100% |

|Question 21 of 50 |

|Color blindness is a sex-linked recessive trait. A mother with normal color vision and a color blind father have a color blind daughter. Which of the following statements |

|is correct? |

|All of their daughters will be color blind. |

|The mother is a carrier of the color blindness gene. |

|All of their sons will have normal color vision. |

|All of their sons will be color blind. |

|Question 22 of 50 |

|In sickle cell anemia, the heterozygous condition results in resistance to malaria. If two heterozygous parents have a child, what are the chances of that child being |

|resistant to malaria but not having sickle cell anemia? |

|25% |

|50% |

|75% |

|100% |

| |

| |

| |

| |

| |

|Question 23 of 50 |

|In guinea pigs, the allele for rough coat (R) is dominant to the allel for smooth coat (r). A rough coat male and a smooth coat female mate. They produce several litters, |

|of which 50% are smooth coat. What were the genotypes of the parents? |

|RR x rr |

|Rr x rr |

|RR x Rr |

|Rr x Rr |

|Question 24 of 50 |

|Which genotype is used in a test cross? |

|Homozygous dominant |

|Heterozygous dominant |

|Homozygous recessive |

|Heterozygous recessive |

|Question 25 of 50 |

|How would genetically altering crops for pest resistance be economically beneficial? |

|Erosion of topsoil would no longer be a concern. |

|Crops would be more easily protected from weeds. |

|Crop-eating pest would not ruin crops. |

|Abnormal plant growth would be eliminated. |

|Question 26 of 50 |

|Great caution must be excercised with recombinant DNA technology. What is the main reason for this concern? |

|possible patent violations from competing comapnies |

|possibility of the fragile recombinant organism dying |

|possible release of gentetically engineered organisms into the environment with unpredictable results |

|Possibility of producing medicine at a lower cost than with current technology. |

|Question 27 of 50 |

|Which of the following DNA technologies offers the best chance of survival for endagered species? |

|sequencing |

|cloning |

|electrophoresis |

|antibody production |

|Question 28 of 50 |

|After preforming amniocentesis, which analysis is most often used to determine the chromosomal condition of a developing fetus? |

|blood type |

|DNA sequence |

|genetic marker - karyotype |

|Question 29 of 50 |

|When viewing a karyotype to detect genetic disorders, which of the following would be a concern? |

|different chromosomes of different lengths |

|two X chromosomes |

|twenty-three pairs of chromosomes |

|three chromosomes in any one set |

|Question 30 of 50 |

|Albinism is a genetic mutation that results in some animals being born without the enzyme that produces the pigment for skin and eye color. Which of the following best |

|explains this mutation? |

|The DNA failed to replicate. |

|The deoxyribose sugar became seperated from the DNA. |

|The genetic code change caused the wrong proteins to form. |

|The RNA necessary to produce proteins was not present. |

|Question 31 of 50 |

|A student has cystic fibrosis, a genetic condition caused by the presence of a homozygous recessive gene. What could be her parent's genotypes for the cystic fibrosis |

|trait? |

|Her father is homozygous dominant; her mother is homozygous recessive. |

|Her father is heterozygous; her mother is heterozygous dominant. |

|Her father is homozygous dominant; her mother is homozygous dominant. |

|Her father is heterozygous; her mother is homozygous recessive. |

|Question 32 of 50 |

|The genetic information in the DNA of humans, chimpanzees, and gorillas is more that 98% the same. What is the most likely explanation for this similarity? |

|They evolved from a common ancestor. |

|They evolved from each other. |

|Their evolution is nearly complete. |

|They evolved at the same time. |

|Question 33 of 50 |

|Islands are the habitats of many of the world's rare species. Which of the following factors contributes most to this situation? |

|small land area |

|genetic isolation |

|limited food variety |

|fewer predators |

|Question 34 of 50 |

|Biochemical analysis uses similarties in which of the following as evidence for evolutionary relationsips? |

|amino acid sequence -bone structure |

|cellular architecture -movement |

|Question 35 of 50 |

|The Galapagos finches are a group of closely related species of birds. Over time, specialized beaks have evolved for each species in response to mutations and competition |

|for food and living space. This is an example of which of the following? |

|adaptive radiation |

|coevoltion |

|convergent evolution |

|vestigial structures |

|Question 36 of 50 |

|A popluation of bacteria is treated with an antibiotic. How will variation in the population of bacteria increase the likelihood of survival? |

|It allows all of the bacteria to be resistant to the antiobiotic. |

|It enables the population to increase rapidly. |

|Some of the bacteria may be resistant to the antibiotic. |

|The population will be better able to to obtain a food source. |

|Question 37 of 50 |

|Whcih of the following is an example of natural selection in bacteria? |

|genetic engineering |

|binary fission |

|antibiotic resistance |

|nitrogen fixation |

|Question 38 of 50 |

|If you see the symbol of a skull and crossbones on a bottle in a laboratory experiment, you are being advised that you are: |

|working with chemicals that could be hazardous |

|not to touch an electrical outlet with wet hands |

|to notify your teacher if you taste a poisonous chemical |

|not to work with animals of any kind. |

|Question 39 of 50 |

|The process of science starts with: |

|a hypothesis |

|a theory |

|a conclusion |

|an observation |

|Question 40 of 50 |

|If you are using a light microscope to observe a stained slide, you are using a: |

|phase contrast microscope -dark field microscope -Nomarski |

|microscope -compound microscope |

|Question 41 of 50 |

|All types of living things do each of the following EXCEPT: |

|grow and develop |

|reproduce |

|destroy the environment |

|respond to stimuli |

|Question 42 of 50 |

|The most abundant compound in living things is: |

|carbon dioxide |

|water |

|sodium chloride |

|sugar |

|Question 43 of 50 |

|Each of the following is a major role of lipids in living organisms EXCEPT the |

|formation of biological membranes |

|action as chemical messengers |

|storage of energy |

|movement of cells |

|Question 44 of 50 |

|Enzymes are NOT important in: |

|regulating chemical pathways |

|transferring information |

|determining the pH of a substance |

|releasing energy |

|Question 45 of 50 |

|The energy levels surrounding the nucleus of an atom contain: |

|protons |

|electrons |

|neutrons |

|ions |

|Question 46 of 50 |

|A covalent bond is formed by: |

|sharing electrons |

|transferring electrons |

|losing electrons |

|gaining electrons |

| |

| |

|Question 47 of 50 |

|Primary consumers are also known as: |

|carnivores |

|herbivores |

|decomposers |

|scavengers |

|Question 48 of 50 |

|Energy flows through an ecosystem from the sun to: |

|producers and then consumers |

|consumers and then producers |

|primary consumers |

|secondary consumers |

|Question 49 of 50 |

|Nutrients move through the biosphere in nutrient or... |

|carbon cycles |

|nitrogen cycles |

|biogeochemical cycles |

|water cycles |

|Question 50 of 50 |

|Earth's biosphere includes |

|all life and organic matter in the oceans |

|all life and organic matter in soil and on land |

|all life an organic matter in the atmosphere |

|all of the above |

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