BIO 201 EXAM #2 2026/27
QUESTIONS AND ANSWERS 100%
CORRECT
What do chromosomes contain? - ANSWER-DNA and protein
DNA - ANSWER--consists of two long polynucleotide chains
-each chain, or strand, is composed of four types of nucleotide subunits, and the two
strands are held together by hydrogen bonds between the base pairs on each strand
What are nucleotides composed of? - ANSWER-nitrogen containing base and a five-
carbon sugar
-for DNA, the sugar is deoxyribose and the base is A, T, G, or C
genetic code - ANSWER-the exact correspondence between the 4-letter nucleotide
alphabet of DNA and the 20-letter amino acid alphabet of proteins
What happens during mitosis? - ANSWER-This is when division of the nucleus
occurs. The chromosomes that have been replicated are distributed to two daughter
nuclei.
When does DNA replication take place? - ANSWER-Interphase
What two DNA sequences ensure that DNA replication occurs during interphase? -
ANSWER-Replicated origins and telomeres
Replication origin - ANSWER-where DNA replication begins
-eukaryotic chromosomes contain many replication origins to allow the long DNA
molecules to be replicated rapidly
human genome - ANSWER-full set of chromosomes
karyotype - ANSWER-full set of 46 chromosomes
chromosomes function - ANSWER--organize and carry genetic information
-carry genes-functional units of heredity
gene - ANSWER-a segment of DNA that contains the instructions for making a
particular protein or RNA molecule
What must happen to form a functional gene and were do these processes occur? -
ANSWER-1. a DNA molecule must carry the gene
2. must be able to be replicated
3. the replicated copies must be separated and partitioned equally and reliably into
the two daughter cells at cell division
QUESTIONS AND ANSWERS 100%
CORRECT
What do chromosomes contain? - ANSWER-DNA and protein
DNA - ANSWER--consists of two long polynucleotide chains
-each chain, or strand, is composed of four types of nucleotide subunits, and the two
strands are held together by hydrogen bonds between the base pairs on each strand
What are nucleotides composed of? - ANSWER-nitrogen containing base and a five-
carbon sugar
-for DNA, the sugar is deoxyribose and the base is A, T, G, or C
genetic code - ANSWER-the exact correspondence between the 4-letter nucleotide
alphabet of DNA and the 20-letter amino acid alphabet of proteins
What happens during mitosis? - ANSWER-This is when division of the nucleus
occurs. The chromosomes that have been replicated are distributed to two daughter
nuclei.
When does DNA replication take place? - ANSWER-Interphase
What two DNA sequences ensure that DNA replication occurs during interphase? -
ANSWER-Replicated origins and telomeres
Replication origin - ANSWER-where DNA replication begins
-eukaryotic chromosomes contain many replication origins to allow the long DNA
molecules to be replicated rapidly
human genome - ANSWER-full set of chromosomes
karyotype - ANSWER-full set of 46 chromosomes
chromosomes function - ANSWER--organize and carry genetic information
-carry genes-functional units of heredity
gene - ANSWER-a segment of DNA that contains the instructions for making a
particular protein or RNA molecule
What must happen to form a functional gene and were do these processes occur? -
ANSWER-1. a DNA molecule must carry the gene
2. must be able to be replicated
3. the replicated copies must be separated and partitioned equally and reliably into
the two daughter cells at cell division
