Which of the following describes a negative feedback loop?

Biology

2 answers:

wolverine [178]3 years ago

5 0

I believe the answer is b

sveta [45]3 years ago

5 0

ANSWER is A

When blood sugar concentration is too low, the endocrine system secretes hormones that increase blood sugar concentration to a normal level.

Explanation:

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Where within the cell does the process of respiration take place?

Wewaii [24]

The answer is c. both inside and outside of the mitochondria

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45. The main product(s) of the light-independent ( dark reactions ) of photosynthesis is/are

alexira [117]

Answer:

C. glucose

Explanation:

Dark reaction takes place outside the thalakoid membrane (stroma and cytoplasm). During dark reactions, energy is released from ATP and NADPH to fix carbon dioxide into glucose.

Option A and B are not correct because they are produced during light reactions. Likewise, chlorophyll is the part of cell and is not prepared during light or dark reactions at all.

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This table shows the codons found in messenger RNA (attached). Using this information, what sequence of nucleotides in the templ

Rashid [163]

Answer:

Explanation:

The correct answer would be option A - GUA-CAU-ACC

Looking at the table of codons, for the amino acid Val, the first base (which is on the 1st column in the 6th row) is G while the second base (2nd column, 2nd row) is U. The third column can be any of U, C, A, or G (6th column, 4th row). Hence, GUA is plausible

For the amino acid His, the first base is C (1st column, 2nd row), the second is A (4th column, 4th row) while the last could be any of the 4 bases. Hence, CAU is plausible.

For the amino acid Thr, the first base is A (first column, 5th row), the second is C (3rd column, 2nd row) while the 3rth could be any of the 4 nucleotide bases. Hence, ACC is plausible.

Therefore, the correct sequence of nucleotides for Val-His_Thr would be GUA-CAU-ACC

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7. In a classification system, kingdoms contain: (a) the greatest

Tju [1.3M]

Answer:

Explanation:

The kingdom is the least specific classification of living things, so it therefore encompasses the largest variety of organisms

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3 years ago

When getting a vaccination, which substance is

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Answer – 3. A weakened form of a virus
When getting a vaccination, the substance which is injected into the body is a weakened form of a virus. This weakened from of the virus has the ability to arouse the body’s defense mechanism without causing an infection.

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3 years ago