Anonymous 4 years ago
1. gene regulation in eukaryotes (1 point)
usually involves operons.
is simpler than in prokaryotes.
allows for cell specialization.
includes the action of an operator region.

2. specialized cells regulate the expression of genes because they (1 point)
do not want the genes to become worn out.
cannot control the translation of proteins.
do not carry the complete genetic code in their nuclei.
do not need the proteins that are specified by certain genes.

3. what is one difference between transcription factors and mirna (interference rna)? (1 point)
mirnas are mobile chemical messengers, while transcription factors are not.
transcription factors work at halting transcription, while mirnas work at destroying the products of transcription.
mirnas bind to dna, while transcription factors do not.
transcription factors control eukaryotic gene regulation, while mirnas control prokaryotic gene regulation.

4. why does it take only a few homeotic genes to control the development of a eukaryote? (1 point)
because each homeotic gene begins a cascade of events that leads to the formation of a specific body part
because eukaryotes have surprisingly small numbers of genes in any one cell
because each cell receives only a fraction of the total number of genes in the organism
all of the above are correct.

1. c
2. d
3.b
4.a

these are the correct

1. C

2. D

3.B

4.A

Explanation:

1. Gene regulation in eukaryotes (1 point)

usually involves operons.

is simpler than in prokaryotes.

allows for cell specialization

includes the action of an operator region

This occurs because is regulated by repressors and transcriptional activators

2. Specialized cells regulate the expression of genes because they (1 point)

do not want the genes to become worn out.

cannot control the translation of proteins.

do not carry the complete genetic code in their nuclei.

do not need the proteins that are specified by certain genes.**

3. What is one difference between transcription factors and miRNA (interference RNA)?

Transcription factors work at halting transcription, while miRNAs work at destroying the products of transcription

miRNA are transcribed by RNA Riboxyanucleicacid

Why does it take only a few homeotic genes to control the development of a eukaryote? (

because each homeotic gene begins a cascade of events that leads to the formation of a specific body part

your answer is rna to the question.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."