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4 years ago

Cell membrane: just passing through activity chart

Biology

1 answer:

vovikov84 [41]4 years ago

5 0

The cell membrane is a biological membrane that separates the interior of all cells from the outside environment.

It consists of the phospholipid bilayer with embedded proteins. Cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity and cell signaling and serve as the attachment surface for several extracellular structures, including the cell wall, glycocalyx, and intracellular cytoskeleton. Cell membranes can be artificially reassembled.

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during a science fair a group of students came up with the following colon is color an inherent property in objects or is it a p

olya-2409 [2.1K]

A. Color is not an observable phenomenon.
B. It does not attempt to explain the natural world.
C. The experimental group would be too large.
D. How people experience color varies.

I think it would be B or D, you can analyze them both and I'm sure you'll come up with an answer ;)

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4 years ago

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2. What are the steps of Binary Fission?

BaLLatris [955]

Answer:

see the file attached!!

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3 years ago

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What happends to the water when it condenses?

MAXImum [283]

The answer is B

Here is a small experiment you can do to test this.

Put a pot of water on the stove and bring it to a boil. Take a dry lid and cover it for a minute, and lift the lid up. What happens?

What should happen is that the water droplets run down the lid and fall back into the pot.

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3 years ago

What's the word equation for photosynthesis

pentagon [3]

Answer:

the photosynthesis equation is as follows:6CO2+6H20+(energy)-C6H1206+602

Carbon dioxide + water + energy from light produces glucose and oxygen

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3 years ago

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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.

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3 years ago