Answer: B. False
Explanation:
“Hox” genes are a highly conserved group of genes, all of whose products are transcription factors bearing a specific domain (called a ”homeodomain”). The transcriptional activity of a large amount of genes relevant to embryonic development is controlled by regulatory sites which are able to bind to this domain. Changes in the transcriptional activity of even a single Hox gene may thus have dramatic downstream effects on the phenotype, as this will result in several further genes having their transcription either enhanced or suppressed.
Answer:
Statements that are true are:
B) in splicing, intron sequences are removed from the mRNA in the form of lariats (loops), and are degraded = TRUE
C) one mRNA can sometimes code for more than one protein by splicing at alternative sites = TRUE
E) splicing occurs while the mRNA is still in the nucleus = TRUE
Statements that are false are:
A) splicing occurs while the mRNA is attached to the nucleosome = FALSE
D) splicing of mRNA does not involve any proteins = FALSE
Jupiter’s atmosphere is composed mostly like Earth .Jupiter experiences auroras<span> near its northern and southern poles. But on Jupiter, the aurora activity is much more intense and hardly ever stops. </span>
Answer;
Doctors recommend that women avoid most medications and alcohol during pregnancy because these substances may cross the placenta and harm the embryo or fetus.
Explanation;
The doctors recommend that women avoid most medications and alcohol during pregnancy.
Alcohol during pregnancy can cause fetal alcohol syndrome which is a serious condition that can affect a child throughout life.
Some drugs, substances or medications may be harmful during pregnancy, depending on the amount and frequency of use.
Answer:
The correct option is : d. Syncytia
Explanation:
Syncytia are the multinucleated cells formed from multiple fusions of the uninuclear cells.
During a infection, an infected cell fuse together with the neighboring host cells, leading to the formation of large multinucleated cells, called syncytia.
Viruses like herpesviruses, induce the formation of multinucleated syncytia cells.
