When dna replicates select one: a. transcription factors determine where to begin dna replication. b. the original dna unwinds, and multiple copies of a region are transcribed before the dna closes back up. c. the original dna is not affected and a new double-stranded dna is made from two new strands of dna. d. a cell that was diploid (2n) will now be tetraploid (4n). e. one strand of the original dna ends up in each of the new dna molecules?

First problem: for each of the following sequences, fill in the mrna sequence, the amino acid sequences, and the rrna anticodonsthat have been left blank.a) dna: atácga aatcgcgatcgcggcgattoggb) mrna: ? c)codon: ? d)anticodon: ? e)amino acids: ? second problem: see abovea) dna: titaoggccatgaggga a tagtig gillarib)mrna: ? c) codon: ? d)anticodon: ? e) amino acids: ? third problem: see abovea) dna: tacgggcctat acgctactactca tgsatcggb) mrna: ? c)codon: ? d)anticodon: ? e)amino acids: ?

What are four key elements of the study of economics?

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1