All categories

1 year ago

Based on the model explain whether the molecules shown crossing the membrane require energy to do so

Biology

1 answer:

Svetach [21]1 year ago

4 0

Answer:

As the diagram is not given, hence let's generally describe the movement of molecules along the cell membrane.

Molecules can either pass through the cell without using energy through the process of passive transport. An example includes molecules of oxygen.

Molecules which are large and un-polar cannot move through the cell membrane easily. These molecules will require energy to move through the cell membrane. These molecules might move in with the help of the carrier or facilitated proteins. Examples include molecules of glucose.

You might be interested in

Most of what we know about the lac operon of E. coli has come from genetic analysis of various mutants. In the following list ar

vivado [14]

Answer:

Strain Presence of Lactose Absence of Lactose

$I^{+} P^{+}O^{+} Z^{+}$ (+) (-)

For the wild type case, the lacZ gene product will be expressed in the presence of lactose only.

$I^{S} P^{+}O^{+} Z^{+}$ (-) (-)

Because of the super repressor, transcription will not take place regardless of the presence of lactose.

$I^{+} P^{+}O^{C} Z^{+}$ (+) (+)

The constitutive operator will allow for transcription to occur, whether or not lactose is present.

$I^{-} P^{+}O^{+} Z^{+}$ (+) (+)

The repressor is non-functional, transcription will occur with or without presence of lactose.

$I^{S} P^{+}O^{C} Z^{+}$ (+) (+)

The super repressor will not be able to stop transcription as it cannot bind to the constitutive operator.

$I^{+} P^{-}O^{+} Z^{+}$ (-) (-)

The promoter is non-functional, transcription will not start and hence, not gene product formed.

$I^{+} P^{+}O^{+} Z^{+}$ (-) (with glucose present) (-)

E. coli will not metabolize lactose in the present of glucose, since glucose is the preferred source of nutrition.

Hope that answers the question, have a great day!

3 0

1 year ago

Over a period of time, the beetles once again reached carrying capacity and sustained it for many years. However, pollution from

Nookie1986 [14]

Answer:

As the beetles have a uniform distribution, at a carrying capacity of 14,600 beetles, there are about 128 beetles per hectare. Because 55 hectares are now unlivable, the carrying capacity would decrease by about 7,040 individuals (55 × 128).

Therefore, the carrying capacity of the ecosystem will be (old carrying capacity – decrease in carrying capacity) = (14,600 – 7,040) = 7,560 beetles.

Explanation:

answer from Plato

4 0

1 year ago

Read 2 more answers

Could two unicorns with no horns have an offspring with a horn

agasfer [191]

Two unicorns with no horns could have an offspring if the horn trait is recessive and the no-horn trait is dominant. There would be a 25% chance of the offspring from these two unicorns having a baby unicorn with a horn.

8 0

1 year ago

Match each organ or function with its body system. protects against infection spleen spinal cord senses stimuli lymph nodes brai

kolbaska11 [484]

Answer: The correct match for the given organs and function is a s follows-

1) Protects against infection - spleen, lymph nodes

2) Senses stimuli - brain, spinal cord.

Spleen and lymph nodes are the organs of the lymphatic system that help in destroying pathogens ( disease causing organisms) that enter the body of the individual.

Brain and spinal cord are the part of nervous system, which senses the information from environment and interprets it in the form of appropriate response.

5 1

2 years ago

Read 2 more answers

List two factors that can increase flood risk

Alexxx [7]

Answer:

two factors that can increase flood risk heavy rainfall. and long periods of rain.

Explanation:

7 0

2 years ago

Read 2 more answers