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IrinaVladis [17]
3 years ago
8

How does a DNA mutation cause a disease like sickle-cell anemia? (1 point)

Biology
1 answer:
Arte-miy333 [17]3 years ago
4 0

Explanation:

nide iabr o

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What do you notice about the ligands and their receptors in these images?
aliina [53]

Answer:

What can be noticed about the ligands and their receptor is that the configuration of both coincide, as a key would with its lock, which demonstrates the specificity of a receptor by its ligand.

Explanation:

A <u>ligand</u> corresponds to a molecule considered a signal or a messenger, while the <u>receptor</u> is a protein on the cell surface, with the capacity to accept a ligand.

Ligands and receptors constitute pairs that complement each other, so that <u>each receptor can bind to a specific ligand</u>, similar to what happens with a key and a lock.

Once the ligand-receptor complex is formed, changes occur inside the cell, which define a certain effect.

8 0
2 years ago
.. Which of the following mutations would have the potential to affect future generations of
ch4aika [34]

Answer choices:

  • A frame shift mutation in the X chromosome of a cheek cell
  • A chromosomal mutation in the Y chromosome of a kidney cell
  • A point mutation in the first chromosome of a sperm cell
  • A substitution mutation in the third chromosome of a uterus cell

Answers:

A point mutation in the first chromosome of a sperm cell

Explanation:

Only mutations that affect the germ line are passed on to the next generation. Therefore, only mutations in the egg and sperm of an individual have the potential to affect the next generation.

Mutations in cheek cells, kidney cells, and uterus cells might cause cell death or cancer. This genetic material is not passed on to the next generation, only the egg and sperm contribute this material. Therefore, only mutations here will affect the generation.

4 0
2 years ago
Beadle and Tatum used which of the following organisms to support their one gene - one enzyme concept?
Rama09 [41]

Answer:

Neurospora.

Explanation:

Beadle and Tatum experiment shows one gene one enzyme hypothesis. According to this, a single enzyme is encoded by each gene. This idea is not accepted in today's world.

Beadle and Tatum performed experiment on the neurospora. They chosed neurospora in their experiment because neurospora shows the fast life cycle with alternation of generation. The genetic experiments can be easily performed on neurospora.

Thus, the correct answer is option (c).

8 0
3 years ago
Why are negative feedback loops used to control body homeostasis? <br><br> (Short answer)
liberstina [14]

Answer:

Homeostasis is defined as the state of body in which body maintains several chemical and physical changes inside the body affected by external factors.

Negative feedback loop includes a sensor, stimulus, control center, and effector which is used to control homeostasis.

A negative feedback loop is a reaction that reduce an excessive response and maintain the functions within the normal range. for example: if temperature and blood glucose level increases in the body, negative feedback loops control both the variables and maintain homeostasis.  

Hence, negative feedback loops used to control body homeostasis.

8 0
3 years ago
Green plants produce their own food through the process of photosynthesis
Eddi Din [679]

Answer:

true

Explanation:

Green plants have the ability to make their own food. They do this with a process called photosynthesis, which uses chlorophyll. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide and water into glucose.

3 0
3 years ago
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