BSC 1005 Exam #2 UPDATED ACTUAL
Exam Questions and CORRECT Answers
DNA has the capacity to - CORRECT ANSWER - store genetic information, copy it, and
pass it from one generation to the other generation.
Chromatin is - CORRECT ANSWER - DNA and proteins
Nucleic acids - CORRECT ANSWER - DNA and RNA; consist of long chains of
nucleotides. Therefore nucleotides are monomers and nucleic acids are polymers.
DNA is double stranded while - CORRECT ANSWER - RNA is single stranded.
Each nucleotide consists of 3 main parts; - CORRECT ANSWER - a nitrogenous base
with a purine or pyrimidine, a pentose sugar with 5 carbon atoms, and a phosphate group
consisting of 1, 2, or 3 phosphate groups attached to the carbon atom.
Purines - CORRECT ANSWER - Adenine and Guanine
Pyrimidines - CORRECT ANSWER - Cytosine and Thymine
Purines and Pyrimidines are connected by - CORRECT ANSWER - a hydrogen bond.
Adenine is to _ as Cytosine is to _. - CORRECT ANSWER - Thymine; Guanine
In RNA, Thymine is replaced by - CORRECT ANSWER - Uracil.
It is the order of these bases in a nucleic acid - CORRECT ANSWER - that specifies
genetic information.
, Small hydroxyl groups hang from - CORRECT ANSWER - the sugar portion of the
nucleotide.
DNAs have one less - CORRECT ANSWER - O (H & OH), hence the name Deoxy ribose,
than RNA.
RNA has two - CORRECT ANSWER - OH groups.
In cells, each DNA molecule is organized as - CORRECT ANSWER - a chromosome.
A chromosome - CORRECT ANSWER - consists of DNA and adssociated proteins,
carries a cell' s genetic info.
Genome (chromatin) - CORRECT ANSWER - entire DNA center of the cell.
Rungs of DNA are made of - CORRECT ANSWER - nitrogen bases connected by
hydrogen bonds.
James Watson and Francis Crick - CORRECT ANSWER - won the Nobel prize for their
3D double helix model of DNA molecule.
DNA contains - CORRECT ANSWER - anti-parallel strands; oriented but in different
directions.
Hydrogen bond sticks strands together and - CORRECT ANSWER - breaks when
replicating.
Role of enzymes: - CORRECT ANSWER - DNA polymerase adds new nucleotides to new
strand. To proofread pairs are correctly matched uses ATP.
Exam Questions and CORRECT Answers
DNA has the capacity to - CORRECT ANSWER - store genetic information, copy it, and
pass it from one generation to the other generation.
Chromatin is - CORRECT ANSWER - DNA and proteins
Nucleic acids - CORRECT ANSWER - DNA and RNA; consist of long chains of
nucleotides. Therefore nucleotides are monomers and nucleic acids are polymers.
DNA is double stranded while - CORRECT ANSWER - RNA is single stranded.
Each nucleotide consists of 3 main parts; - CORRECT ANSWER - a nitrogenous base
with a purine or pyrimidine, a pentose sugar with 5 carbon atoms, and a phosphate group
consisting of 1, 2, or 3 phosphate groups attached to the carbon atom.
Purines - CORRECT ANSWER - Adenine and Guanine
Pyrimidines - CORRECT ANSWER - Cytosine and Thymine
Purines and Pyrimidines are connected by - CORRECT ANSWER - a hydrogen bond.
Adenine is to _ as Cytosine is to _. - CORRECT ANSWER - Thymine; Guanine
In RNA, Thymine is replaced by - CORRECT ANSWER - Uracil.
It is the order of these bases in a nucleic acid - CORRECT ANSWER - that specifies
genetic information.
, Small hydroxyl groups hang from - CORRECT ANSWER - the sugar portion of the
nucleotide.
DNAs have one less - CORRECT ANSWER - O (H & OH), hence the name Deoxy ribose,
than RNA.
RNA has two - CORRECT ANSWER - OH groups.
In cells, each DNA molecule is organized as - CORRECT ANSWER - a chromosome.
A chromosome - CORRECT ANSWER - consists of DNA and adssociated proteins,
carries a cell' s genetic info.
Genome (chromatin) - CORRECT ANSWER - entire DNA center of the cell.
Rungs of DNA are made of - CORRECT ANSWER - nitrogen bases connected by
hydrogen bonds.
James Watson and Francis Crick - CORRECT ANSWER - won the Nobel prize for their
3D double helix model of DNA molecule.
DNA contains - CORRECT ANSWER - anti-parallel strands; oriented but in different
directions.
Hydrogen bond sticks strands together and - CORRECT ANSWER - breaks when
replicating.
Role of enzymes: - CORRECT ANSWER - DNA polymerase adds new nucleotides to new
strand. To proofread pairs are correctly matched uses ATP.
