Which of the following describes the process of protein synthesis? A) pieces of

Question

Which of the following describes the process of protein synthesis? A) pieces of the DNA molecule randomly break off and spontaneously travel to another cell where they are assembled into proteins. B) the code is transcribed by mRNA, which takes the message out of the nucleus to a ribosome, where amino acids are then transferred by tRNA and assembled into proteins. D) polypeptide chains are broken down into amino acids that are then fed to mitochondria The end result of the process of meiosis (not sex) is B) four genetically unique sex cells C) a diploid fertilized egg D) a chicken Recombination is a process in which a) Sister chromatids are fused together to form zygotes. b) autosomes are mixed together to form sex chromosomes. c) sections of homologous chromosomes "crossover" during meiosis. D) hybrids are formed when pieces of different creatures are spliced together in a laboratory. When a male haploid cell successfully combines with a female haploid cell, the usual result is A) All of these answers are correct B) a diploid cell C) a fertilized egg What is an allele? A) a gamete C) the location of a gene on a chromosome D) an organelle PCR is useful for B) studying ancient DNA C) comparing sections of mtDNA D) all of these are applications for PCR Autosomes are chromosomes 1 - 22 (not chromosome number 23). According to the article "Epigenetics", what we do to our bodies during our lifetimes has no effect on genetic expression in our children. Regulatory genes help control the expression of structural genes without coding for a protein themselves. The physical expression of a genotype is called a A) karyotype B) nondisjunction C) phenotype

Explanation / Answer

18.B (base code of mRNA is read by tRNA having complementary anticodon and an amino acid)

19.B (meosis never forms diploid and somatic cells. It occur in germ cells to form haploid gametes for reproduction)

20.C

21.A (A diploid cell is a fertilized cell with later on become zygote)

22.B

23.D (as all these techniques require amplification of DNA)

24.T (23rd is sex chromosome)

25.F

26.T. (these regulatory proteins bind to the promotor/operator region of target gene to affect the binding of RNA polymerase and hence their expression)

27.C (phenotype is what we see from our eyes. e.g. height, skin color etc)

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