1. DNA or RNA

The steps of the DNA ladder are made of _____. nucleotides deoxyribose paired nitrogen bases phosphoric acid

paired nitrogen bases

1. a five-carbon sugar 2. a giant molecule consisting of the sugar deoxyribose, phosphates, and nitrogen bases 3. a change in the genetic information code 4. one of the three major types of chemicals making up a nucleotide in DNA 5. the combination of phosphate, sugar, and nitrogen bases in DNA or RNA 6. a nucleic acid similar to DNA that uses ribose for the sugar

1. deoxyribose 2. DNA 3. mutation 4. nitrogen base 5. nucleotide 6. RNA

rRNA _____. A. is part of the ribosomes that manufacture polypeptides B. carries DNA encoded information from the nucleus to the ribosomes C. transports amino acids from cytoplasm to ribosomes

A

Mutations in the genetic code can occur when _____. A. the DNA is carried from the nucleus to the ribosome B. DNA duplicates and an amino acid is changed C. amino acids are transported from the cytoplasm to ribosomes D. the cell divides in to daughter cells

B

The genetic code is carried by the _____ molecule in most organisms. chromosomal DNA guanine hereditary

DNA

Each hereditary trait corresponds to _____. a sequence of nitrogen bases a step on the ladder an arrangement of nucleotides an enzyme

a sequence of nitrogen bases

The sugar and phosphate portion of the nucleotides are found _____ on the DNA twisted ladder. as the rungs as segments of the rails as conditions between the steps and the rails none of the above

as segments of the rails

Ribosomal RNA is produced by _____. lysosomes nucleoli mitochondria Golgi bodies

nucleoli

During the process of _____, two rails or sides break apart and attract new nucleotide bases to form a new and complete strand. replication transcription translation

replication

The nitrogen base pairs in the DNA molecule are adenine and ________ or cytosine and ________.

thymine; guanine

During the process of _____, two rails or sides break apart and pair up with RNA nucleotides, assembling mRNA. replication transcription translation

transcription

During the process of _____, mRNA decodes information from the original DNA master plan to build proteins in the ribosomes. replication transcription translation

translition