Location Transport

I NEED HELP! I have a couple of biology questions that I need answered ASAP?

I have a test in a few hours and I don't know if the answers on my study guide are right or not. Can you help me by answering these questions so I can compare my answers to yours. Thanks in advance. 1) What type of cell molecule forms cartilage and hair, can be hormones or transporters, and acts as an enzyme? A) centrosome B) RNA C) protein D) ribosome 2) What would most likely happen if one base were changed in the base sequences of a DNA molecule? A) Messenger RNA would correct the mistake B) Genome copying would be impossible C) Protein synthesis would stop D) A defective protein would be produced 3) If a eukaryotic cell has 22 chromosomes and it undergoes meiosis, how many chromosomes will the resulting gametes contain? A) 11 B) 23 C) 44 D) 46 E) 22 4) For this species with four pairs of homologous chromosomes, the number of unique chromosomes (the number 1n) is: A) 64 B) 4 C) 8 D) 16 E) 32 5) A human cell fails to undergo cytokinesis while performing meiosis II, so that the daughter cells do not form. How many chromosomes will be in the resulting cell? A) 23 B) 46 C) 92 D) 184 6) What is considered a "black box" in biology? A) various cellular organelles B) any of a number of expensive automated scientific machines C) processes in which we know only input and output D) patented devices whose mechanisms are known only by the manufacturer C) an old camera 7) Which type of allele, or allelic combination, can be present in an individual without affecting phenotype? A) dominant B) heterozygous dominant C) homozygous recessive D) recessive E) homozygous dominant 8) Which of the following did Gregor Mendel not illustrate? A) Identical phenotypes d not necessarily mean organisms have identical genotypes B) Units of inheritance come in pairs C) Phenotypic characteristics do not "blend" over many generations D) Inheritance is caused by discrete particles E) Units of inheritance are found on chromsom 9) Before Mendel, people had observed inheritance of dominant and recessive traits by following many generations of plants and animals. What was different about Mendel's work? A) He used a plant that had never been cultivated before B) He kept careful count of his results, including mathematical analysis C) His results were immediately accepted and applied to other studies D) He followed more generations than anyone else E) He did both cross- and self-fertilizations 10) Regarding the human sex chromosomes, which statement is correct? A) The Y chromosomes carries a greater number of genes for asexual traits than does the X chromosome B) X and Y are different in size but carry nearly equal numbers of genes C) The X chromosomes carries more genes for asexual traits than does the Y D) The X chromosomes carries only gender-related genes E) The X chromosomes carries the genes for the development of male phenotype 11) A trait like albinism is seen with equal frequency in males and females. Two people who do not have the trait might have offspring who do have the trait, at a frequency of approximately one in four. What can you conclude about the inheritance of this trait? A) recessive, X-linked B) recessive, autosomal C) recessive, caused by polyploidy D) dominant, X-linked E) dominant, autosomal 12) What is a recessive disorder? A) a genetic disorder with two functioning alleles B) a genetic disorder that will express itself in the presence of two recessive alleles C) a genetic disorder which will express itself in the presence of two recessive alleles D) a genetic disorder that involves change in chromosomes number E) a genetic disorder that involves change in chromosomes structure 13) How were the rough locations of genes and chromosomal processes such as crossing over first visualized in detail? A) by X-ray mutagenesis of Neurospora chromsomes B) by isolating chromosomes from the pea plants used by Mendel C) using unusual, abnormally large chromosomes from Drosophila D) using X-ray crystallography to examine chromosome structure E) by examining mutations in sperm and egg chromosomes 14) How are X rays used in the technique of X-ray crystallography? A) The scattering of X rays by a purified form of a molecule reveals its structure B) DNA strands are separated by X-ray energy, revealing the order of bases C) Cells are broken open to release chromosomes by being bombarded with X rays D) The X rays are used to mutate DNA, to determine the location of genes E) Enzymes are destroyed by X rays, revealing the order of steps in metabolism 15) Watson and Crick: A) relied heavily on the experimental results of others B) did extensive experimentation C) were unaware that others were also seeking the structure of DNA D) had strong evidence that DNA was a protein E) were hired by laboratories speciifically to study DNA 16) Watson and Crick discovered: A) that DNA is made of nucleotides B Thanks man. I asked somebody else this question and they gave me all the wrong answers.

Public Comments

1. 1: C. protein 2. D. defective protein 3. A. 11 (it halves) 4. C. 8 (a pair are similar but not identical) 5. A. 23 (same as normal cell) 6. unsure - at a guess C 7. recessive 8. D. discrete particals If i were you, i'd just trust the guide as its most like correct the rest someone else will have to do