What are the components of a DNA molecule?
deoxyribose, a phosphate and one of the bases: adenine, cytosine, guanine or thymine
ribose, a phosphate, and one of the bases: adenine, cytosine, guanine or uracil
Deoxyribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine
Ribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine
What type of bond holds the complementary base pairs together in a double helix of DNA?
Covalent bonds
Peptide bonds
Glycosidic bonds
Hydrogen bonds
What enzyme is used in transcription but not in translation?
DNA polymerase
Helicase
Protease
RNA polymerase
A certain gene in a bacterium codes for a polypeptide that is 120 amino acids long. How many nucleotides are needed in the mRNA to code for this polypeptide?
30
40
360
480
What is responsible for the conservation of the base sequence during DNA replication?
DNA polymerase working on one strand at the same time.
Unpaired bases always attracting their complementary nucleotides.
DNA helicase and polymerase are complementary.
Both strands are identical to each other.
During the process of replication, which bond(s) in the diagram of DNA below is/are broken?
3
4/5
1,2,6,7
1,7,4,5
How would the following DNA sequence, ACGTTGCATGGCA, be transcribed?
UGCAACGUACCGU
TGCAACGTACCGT
ACGTTGCATGGCA
ACGUUGCAUGGCA
The base sequence is the store of information.
Nitrogenous bases have two rings.
The base-phosphate backbone ensures that the store is stable and secure.
In order to link nucleotides into a chain, a hydrogen bond is formed b/n the phosphate and a pentose sugar.
Polymers of nucleotides also known as "strands"
The four bases in RNA are , , and .
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