Chapter 11 Assignment
DNA
- deoxyribose - adenine pairs with thymine - double stranded -double helix
RNA
- ribose - adenine pairs with uracil - typically single stranded - not a double helix
How many bases are covered in one complete 360-degree turn of the helix?
10
Which of the following describes meiosis II in humans?
1N → 1N
Watch the video, and then arrange the following events in the proper order in which they occur during meiosis I. 1 = Separation of homologous chromosomes 2 = Crossing-over 3 = Independent assortment
2, 3, 1
In the Hershey and Chase experiment, radioactively labeled
32P remained inside the cells after vigorous shaking.
Translation is terminated when a stop codon is presented at the ________ site.
A
What part of the phage entered the bacterial cell following infection?
DNA
True or False: The synthesis of messenger RNA is called translation.
F
The complementary messenger RNA strand that would be synthesized from the DNA base sequence of CTGAC would be __________.
GACUG
True or False: Asymmetrical spacing of the backbones of the DNA double helix generates major and minor grooves.
T
True or False: Doubled-stranded DNA consists of two antiparallel strands, meaning that one strand is oriented in the 5' to 3' direction, while the other is oriented in the 3' to 5' direction.
T
True or False: Synthesis of a new strand of messenger RNA is in the 5' to 3' direction.
T
True or False: The addition of a phosphate to a protein after it is produced is an example of post-translational modification.
T
Which of the following occurs as the ribosome shifts down the mRNA by a distance of three nucleotides?
The tRNA that was in the P site moves into the E site.
The correct structure of DNA components can be described as
a sugar-phosphate backbone with nitrogen bases projected into the interior of each helix.
What type of bond holds the nitrogen base of one helix to the other one?
hydrogen
Centromeres divide in
mitosis and meiosis II
At which of the following level(s) can gene expression be regulated in eukaryotes?
passage of mRNA through the nuclear membrane, destruction of the mRNA, and rate of protein synthesis
If 35S was found in progeny phages rather than 32P, Hershey and Chase would have concluded that
phage protein enters the host cell.
The segment of the DNA molecule where messenger RNA synthesis begins is called the
promoter region.
RNA polymerase binds to the
promoter.
Translation is the synthesis of
proteins from mRNA.
The most efficient control of eukaryotic gene expression is achieved at the level of
transcription initiation.
The name of the structure that causes the synthesis of RNA to cease is called the
transcription terminator.
