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Pepsi [2]
3 years ago
15

The largest percentage of accidental deaths is due to:

Biology
1 answer:
Leni [432]3 years ago
7 0
D. transportation accidents.
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Alpha helix and pleated sheets are example of _________ Protein Folding.
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Answer:

Secondary structure proteins folding

Explanation:

Alpha helix and pleated sheets are basically two types if secondary structure of Proteins.

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3 years ago
A woman who is a carrier (heterozygous) for Cystic Fibrosis marries a man who has Cystic Fibrosis, a recessive disease. What are
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Explanation:

The diagram attached will help you and the answers can be taken from the picture

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Black fur (B) is dominant. Find the probability of a black offspring in a cross: bb x bb.
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Answer:

0%

Explanation:

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3 years ago
In the classic Meselson and Stahl experiment, Coli are first grown in 15N-enriched media (0th generation) and subsequently switc
AfilCa [17]

Options are not provided inthe question. Th ecomplete question is as following:

In the classic Meselson and Stahl experiment, Coli are first grown in 15N-enriched media (0th generation) and subsequently switched to 14N media. A DNA sample isolated during the first generation of E. Coli grown in 14N media is subjected to a centrifugation step in a dense CsCl gradient. Assuming that replication occurs in a semiconservative fashion, the DNA sample will _______.

1) run as two bands (of equal intensity), one at the same position as a uniformly 15N-labeled DNA, and one at the same position as a uniformly 14N-labeled DNA.

2) run as one band, at the same position as a uniformly 15N-labeled DNA.

3) run as one band, at the same position as a uniformly 14N-labeled DNA. run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 7.

4) run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 1.

Answer:

1)

Explanation:

In 1957, Meselson and Stahl gave an experimental evidence for semi-conservative replication  of DNA, means that each DNA strand act as template for synthesis of new DNA.

For the experiment, they use  E. coli grown in heavy isotope of 15N nitrogen and switch to 14N nitrogen undergoing one, two, or three generations and the DNA samples are collected. The DNA samples are then mix with cesium chloride and separated as light and heavy DNA.

As the replication occurs in a semiconservative fashion, the double DNA sample will run as two bands with intermediate density, having mixtures of 15N and 14N DNA, either of which would have appeared as DNA.

Hence, the correct option is (1).

8 0
3 years ago
The genetic information of a cell is duplicated and split to form two daughter cells during which of the following processes? A.
katrin [286]

Answer:

B. Cell division

Explanation:

Cell division is a process where a mother cell splits into two daughter cells.

7 0
3 years ago
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