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Andrews [41]
3 years ago
15

Which substance cannot be separated by physical means or chemical means?

Biology
2 answers:
Sophie [7]3 years ago
6 0

Answer:

D: Element

Is the answer...

Feliz [49]3 years ago
4 0

Answer:

I think its D

Explanation:

..........

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What type of bacteria can be found in pairs, chains, squares of four, cubes of eight, or grape like clusters?
liberstina [14]
Coccus-shaped bacteria can be found in pairs, chains, squares of four, cubes of eight, or grape like clusters. More specificially, this type of bacteria found in pairs is called diplococcia, in chains is called streptococci, in squares of four is called tetrads, in cubes of eight is called sarcinae, and in grape like clusters called staphylocci.
5 0
3 years ago
What determines the order of an mRNA sequence?
artcher [175]

Answer:

The sequence of nucleotides, coded in triplets (codons) along the mRNA, that determines the sequence of amino acids in protein synthesis. The DNA sequence of a gene can be used to predict the mRNA sequence, and the genetic code can in turn be used to predict the amino acid sequence.

Explanation:

3 0
2 years ago
In mantle convection currents, hotter rock moves _______, while cooler rock moves _______. A. downward; sideways B. downward; up
lara31 [8.8K]

C. Upward; downward. As the hot rock rises, cooler rock flows downward to take its place next to the core, where it is heated and becomes buoyant enough to rise again later

4 0
3 years ago
Read 2 more answers
"DNA denatures at a higher temperature than does protein, yet its structure depends on relatively weak hydrogen bonds. Why the d
Reika [66]

The option are not given and the options are:

Proteins are denatured by breaking covalent bonds.

Linear molecules like DNA are inherently stable.  

Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

The statement is incorrect; it actually takes far more energy to denature proteins than it does to denature DNA.

Answer:

The correct answer is- Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

Explanation:

Proteins become denatured when it looses its three-dimensional structure. Disulfide bond and hydrogen helps in stabilizing the three-dimensional structure of proteins and if these bonds break due to any factor protein lost its structure and function.

DNA is made up of a large amount of hydrogen bond because in AT base-pairing two hydrogen bonds are required and in GC base pairing three hydrogen bonds are required. Therefore it can be concluded that as more hydrogen bonds stabilizes DNA than protein its melting temperature is higher than protein.

3 0
3 years ago
When allows humans to have different traits from each other
Mrrafil [7]
Well, we are all made differently because we have different DNA.
5 0
3 years ago
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