WorksheetsDNA Structure DOK 2 and 3
Total questions: 15
Worksheet time: 22mins
What happens to the DNA helix when a cell reproduces?
It partially dissolves in the cytoplasm
It unzips and makes a copy of itself
It forms a vesicle until division is complete
It forms a plasmid and doubles in size
If nitrogenous bases of DNA were connect with strong covalent bonds, how might DNA replication be effected?
The process would require less energy to break and reform bonds
The process would take longer because the bases would only separate in one place
The bases would not come apart easily, making it difficult to read the sequence
The bases would not fit around the histones, making longer chromosomes
A student compared DNA replication to making a photocopy of a document. Which statement is the BEST description?
Both create a mirror image of the original, but in DNA replication the original is consumed to create the copies.
Both result in an exact copy being created, but photocopying the original is broken down by the process
Both result in an exact copy being created, but in DNA replication one half of the original becomes part of the copy
Both create a mirror image of the original, but in photocopying multiple copies can be made at one time.
What is the relationship between proteins and nucleic acids?
Nucleic acids encode and transmit genetic information which is used to make proteins
Proteins are produced by the mitochondria that are made up of nucleic acids
Proteins compose the nucleic acids that store genetic information
Nucleic acids are the basic units that compose proteins in the cell
Which images represent pyrimidines? (two answers)
Which images represent purines? (two answers)
What is the primary function of DNA?
To determine the sequence of amino acids in a protein molecule
To determine the sequence of saccharide monomers in a polysaccharide molecule
To determine the sequence of traits in an individual
To determine the sequence of fatty acids in a glycerol molecule
The work of Erwin Chargaff allowed Watson and Crick to determine the rules of.......
protein synthesis
transcription
hydrogen bonding
nitrogenous base pairing
DNA polymerase BUILDS new DNA by adding new nucleotides from the ____________.
5' to 3' direction
3' to 5' direction
Which of the following is considered the "Central dogma of biology"?
Evolution by natural selection leads to changes in population
"DNA that is transcribed into RNA which is translated into protein" .
Proteins have four levels of structure. The fourth level is when all 3D subunits come together to make a functional protein.
During DNA replication, which protein keeps the two strands of DNA from reannealing (sticking back together?)
Single Stranded Binding Proteins (SSBP)
Helicase
DNA polymerase
Ligase
