Amniotes produce eggs that contain fluids that bathe the embryo during gestation..

Biology

2 answers:

garik1379 [2K]3 months ago

8 0

Response: a) true

Clarification: The liquid within the egg plays a critical role in ensuring the embryo's survival and providing a fluid medium necessary for its development.

enyata [2.5K]3 months ago

8 0

Response: True

Clarification:

Amniotes possess a protective layer known as the amnion, which acts as a safeguard during the growth phase. This layer contains amniotic fluid, which is believed to be present in the developing embryos and also facilitates their movement. This fluid is composed of proteins and various minerals.

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Convert enzyme concentrations of 2.5%, 5.0%, and 10% to ppt units.

lana [2441]

Answer:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

Explanation:

The term ppt denotes parts per trillion, meaning how many parts of the enzyme are present in 1 trillion parts. Percentage denotes the number of parts per 100 units. To convert the provided values from percentage to ppt:

$\frac{2.5}{100}=\frac{a}{1,000,000,000,000}\\a=2.5 *10^{10}\ ppt\\\\\frac{5.0}{100}=\frac{b}{1,000,000,000,000}\\b=5.0 *10^{10}\ ppt\\\\\frac{10}{100}=\frac{c}{1,000,000,000,000}\\c=1*10^{11}\ ppt$

The concentrations in ppt are:

2.5 x 10¹⁰ ppt

5.0 x 10¹⁰ ppt

1.0 x 10¹¹ ppt

7 0

4 months ago

In E. coli, the primary component of the mismatch repair system is the protein MutS. How does MutS recognize mismatched base pai

-BARSIC- [2551]

Answer:

The most accurate answer to the inquiry, based on findings regarding this specific mechanism in E. Coli, is: D) It detects hemimethylated base pairs and extends the methylation to the unmethylated base.

Explanation:

Research into this complex subject, particularly in E. Coli and other gram-negative prokaryotes, indicates that whether or not methylation is present will trigger MutS, a protein present in both prokaryotes and eukaryotes that plays a crucial role in launching and executing the entire DNA mismatch repair operation. When daughter DNA strands are synthesized from the parent strands, these initial strands often contain various mismatches and deletions that require rectification, identifiable because the daughter strands are hemimethylated. This situation prompts MutS in E. Coli to attach to the damaged DNA strand, and accompanied by other complex members like MutH and MutL, it starts the repair process.

The exact methodology by which MutS repairs DNA in eukaryotes and different prokaryotic organisms remains not entirely elucidated.

6 0

3 months ago