1. The DNA base pairing rules are: a) Any combination of the bases. b) T pairs with C, and A pairs with G. c) A pairs with T, and C pairs with G. d) C pairs with A, and T pairs with G. 2. DNA in cells is damaged: a) Millions of times a day. b) By collisions with other molecules or by chemical accidents and radiation. c) Not very often¸ and by radiation only. d) a and b 3. For genes that code for proteins, which molecule conveys the information from the gene to the ribosome? a) DNA b) mRNA c) tRNA d) rRNA
DNA and RNA
Deoxyribonucleic acid (DNA) is usually called the blueprint of life. Deoxyribose is a monosaccharide that has a key function in the synthesis of deoxyribonucleic acid. One less oxygen-containing hydroxyl group occurs in deoxyribose sugar. Nucleic acid, deoxyribonucleic acid, is one of the natural components. Deoxyribonucleic acid is a double-stranded molecule. Watson and Crick postulated the double-stranded model of the helix. A deoxyribonucleic acid is a molecular group that carries and transmits genetic information from parents to offspring. All eukaryotic and prokaryotic cells are involved.
DNA as the Genetic Material
DNA, or deoxyribonucleic acid, is a long polymeric nucleic acid molecule discovered in the late 1930s. It is a polymer; a long chain-like molecule made up of several monomers connected in a sequence. It possesses certain characteristics that qualify it as a genetic component. Certain organisms have different types of nucleic acids as their genetic material - DNA or RNA.
Genetics
The significant branch in science which involves the study of genes, gene variations, and the organism's heredity is known as genetics. It is also used to study the involvement of a gene or set of genes in the health of an individual and how it prevents several diseases in a human being. Thus, genetics also creates an understanding of various medical conditions.
DNA Replication
The mechanism by which deoxyribonucleic acid (DNA) is capable of producing an exact copy of its own is defined as DNA replication. The DNA molecules utilize a semiconservative method for replication.
no explanation necessary! Letter of answer only.
Part I: Multiple choice
1. The DNA base pairing rules are:
a) Any combination of the bases.
b) T pairs with C, and A pairs with G.
c) A pairs with T, and C pairs with G.
d) C pairs with A, and T pairs with G.
2. DNA in cells is damaged:
a) Millions of times a day.
b) By collisions with other molecules or by chemical accidents and radiation.
c) Not very often¸ and by radiation only.
d) a and b
3. For genes that code for proteins, which molecule conveys the information from the gene to the ribosome?
a) DNA
b) mRNA
c) tRNA
d) rRNA
4. Which of the molecules below is produced during replication?
a) mRNA
b) rRNA
c) tRNA
d) DNA
5. Why is there a difference between the synthesis of a lead strand and that of a discontinuous strand in DNA molecules?
a) The origins of replication are found only at end 5' of the molecule.
b) Helicase and protein factors act at the extremity of 5'.
c) DNA polymerases can only add new nucleotides at the extremity 3' a strand in the process of synthesis.
d) DNA ligase only works in the 3' ; direction towards 5'.
6. Which of the following statements does not apply to a codon?
a) It is made up of three nucleotides.
b) It can code for the same amino acid as another codon.
c) It only codes for a single amino acid.
d) It is found attached to the end of an ANRt molecule.
7. Which of the sequences below is an unused RNA sequence?
a) The
b) The intron
c) The exon
d) The gene
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