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klemol [59]
3 years ago
12

Which observation about the phosphorus tracer supported the researchers' conclusion that DNA, and not proteins, transmits geneti

c information? A. It was in the supernatant only. B. It was in the pellet only. C. It was in both the pellet and the supernatant. D. It was in neither the pellet nor the supernatant.
Biology
1 answer:
lutik1710 [3]3 years ago
7 0

Answer:

Hershey and Chase demonstrated that genetic material is contained in the DNA molecule. By using bacteriophages they observed that DNA, but not proteins, contains the genetic material. These researchers tagged DNA with radioactive phosphorus and then separated bacteria and protein phages by centrifugation, observing that bacterial pellet was radioactive

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What new characteristic did John Dalton add to the model of the atom?
zhannawk [14.2K]
(D)an atom can join with other kinds of atoms.

Basically he explained what a molecule is. 

6 0
3 years ago
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The domestic cat genome contains 2.9×109 base pairs. The length of linker DNA in mammals is 50 base pairs. Approximately how man
IgorLugansk [536]

Answer:

Number of nucleosomes in 2.9 * 10^9bp is equal to 1.47 * 10^7

Explanation:

For wounding one nucleosome, total length of DNA required is equal to 146 bp

The length of  linker DNA in mammals is equal to 50 bp

Thus , the total length of DNA that confides between two nucleosome is equal to the sum of wounding length of DNA and the linker length

= 146 + 50\\= 196bp

Thus, in 196bp length of DNA, the total number of nucleosomes is equal to 1

Thus, number of nucleosomes in 2.9 * 10^9bp is equal to

\frac{2.9* 10^9}{196} \\1.47 * 10^7

8 0
3 years ago
6.(02.01 MC)
Luda [366]

Answer:

Attractive forces between particles.

Explanation:

Solids keep its shape and volume because of strong attractive forces between the particles.

Other options are incorrect:

Because there is no space between solid particles.

The shape of solid does not depend upon type of particles present.

The shape and volume of solids not depend upon the volume and shape of container.

Properties of solids:

Solids have definite volume and shape.

In solids molecules are tightly pack and very close to each other.

Their melting and boiling point are every high.

The densities of solids are also very high as compared to the liquid and gas.

There are very strong inter molecular forces are present between solid molecules.

6 0
3 years ago
How did Mendel’s results from dihybrid crosses help him develop the law of independent assortment?
mart [117]

Explanation:

The out come that mendel's observed from dihybrid crosses confirmed that each trait could be described by a pair of factors that segregated to form progeny (his first law) and further suggested that factors for multiple traits segregated independently, thus forming the basis for mendel's second law of inheritance

Hope this will help you analyse your answer

4 0
3 years ago
Salmah suspects that she has been given a forged cheque. How can
Alex73 [517]

Answer:

Paper Chromatography

Investigators use paper chromatography to distinguish the different brands of ink pens used by the suspects and compare it to the forged cheque.

4 0
3 years ago
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