1. RNA has ribose sugar instead of deoxyribose
2. RNA is generally single-stranded instead of double-stranded
3. RNA contains uracil in place of thymine
Answer - <span>The oral cavity, salivary glands, pharynx, esophagus, and stomach.
Reasoning - These Structures are what builds and performs as a system.</span>
Gene expression is about making mRNA which is then translated into a protein. If the mRNA that was expressed is mis-read it may or may not have an affect on gene expression. It will have a negative effect if:
1. The protein produced is required for gene expression (e.g. the DNA polymerase)
2. The protein produced is another critical protein that the cell cannot live without.
3. If the question is more about constantly misreading during translation, eventually the cell would die because the wrong proteins would be made (or not made at all).
<span>Two checkpoints during the cell cycle that regulate cell division are right before S phase and M phase.
</span>Cell cycle checkpoints are control mechanisms <span>necessary for proper cell division. </span><span>In the cell cycle, there are two checkpoints: </span><span>the G1 checkpoint and the G2 checkpoint. <u>The G1 checkpoint is right before the S phase, and G2 checkpoint is right before the M phase.</u>
If something is wrong at the G1 checkpoint, the cell will not enter the cell cycle. It is important to be delayed before cell enters S phase where DNA replication commences.
The G2 checkpoint is a DNA damage checkpoint and if DNA is damaged, entering the cell cycle is delayed before mitosis (M phase).</span>
Answer:
The sperm of polar bear contain 37 chromosomes.
Explanation:
