2. A mutation that causes disease resistance in potatoes is a(n)

A group of mutations, known as MT-ND1, have been identified in mitochondrial DNA. These mutations are associated with a number o

VMariaS [17]

Answer:

The human mitochondrial DNA (mtDNA) is a double-stranded, circular molecule of 16 569 bp and contains 37 genes coding for two rRNAs, 22 tRNAs and 13 polypeptides. The mtDNA-encoded polypeptides are all subunits of enzyme complexes of the oxidative phosphorylation system.

Explanation:

6 0

3 years ago

1. Suppose the synthesis of an amino acid was accomplished by four enzymes encoded by four genes that formed an operon. Draw a m

vivado [14]

I have attached lac operon model having 4 genes. See attachment for better understanding.

Answer:

The Lac operon is controlled by two signals.

Initiation

Glucose and lactose concentrations control the initiation of transcription of the Lac operon through their effects on the Lac repressor protein and Cap.

Lactose absent (Repression)

When lactose is absent, the Lac repressor binds the Lac operator and shuts off expression of the operon.

Lactose present (Transcription)

Addition of lactose increases the intracellular concentration of a related compound, allolactose. allolactose binds to the Lac repressor, causing it to undergo a conformational change that releases its grip on the operator DNa.

Glucose absent (Repression)

When glucose is absent, cyclic aMp (red triangle) is produced by the cell and Cap binds to DNA.

Glucose present (Transcription)

LacZ, the first gene of the operon, encodes the enzyme b-galactosidase, which breaks down lactose to galactose and glucose.

7 0

3 years ago

Which of these animal would most likely produce antifreeze compound in its cell?

algol13

Antarctic fish. To stop their blood from freezing, some fish that live in the arctic and Antarctic have special Antifreeze proteins. Antifreeze proteins are very clever, as they slow down the formation of bonds between water molecules, which prevents the formation of ice crystals in the fish's blood.

5 0

3 years ago

Match the terms to the descriptions:cytoplasm , epithelial tissues, nucleus, organelles, organs, system, DNA, connective cells,

DiKsa [7]

DNA to 8. the genetic blueprint for all cells

Nucleus to 5. acts as the "brain" of a cell

Connective cells to 9. tendons, blood, and fat are examples of these cells.

Epithelial tissues to 6. designed to regulate temperature, secrete lubricants, and protect the body from harmful substances.

Cytoplasm to 7. fluid like substance in a cell

Organelles to 3. structures that perform special functions within a cell

These are the only ones I know.

5 0

3 years ago

If each bacterium is a copy of the last, how do the bacteria adapt to the presence of the antibiotic

pav-90 [236]

By mutating, especially if it is RNA stranded it will mutate quicker than DNA. Hope this helps brainliest would be awesome!

8 0

3 years ago