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BigorU [14]
3 years ago
14

When is the lac operon most active?

Biology
1 answer:
Over [174]3 years ago
8 0
I believe it's "C. When glucose levels are low and lactose is present" I may be wrong.
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Which statement correctly compares the number of chromosomes in a body cell to that in a sex cell of humans?
Elza [17]

Answer:

D

Explanation:

Two sex cells, the gamete and the sperm, come together to make the body cells, so the number of chromosomes for a body cell must be double that of a sex cell, 46/2=23

i hope this helps u!

pls give a brainliest and a thx ;)

3 0
3 years ago
1. What is the Photosynthesis EQUATION? What is being consumed and what is produced?
Alla [95]
1. 6CO2 + H2O -----> C6H12O6 + 02

2. The idea of photosynthesis or light dependent reactions is to convert solar/light energy into chemical energy by the form of ATP and NADPH. CO2 and Water are consumed and react to release Glucose and 02. Approximately 36-38 ATP produced.

3. Water is the source of hydrogen atoms in the glucose (sugar) created by the photosynthesis reaction.

4 .
Step 1) The light absorbed by chlorophyll causes a transfer of electrons and H+ from H20 molecules already present. This causes the H20 to split into molecular 0xygen (02) and a H+ ion.

Step 2.) The O2 is released (we breathe it) and the H+ bonds to NADP+ creating NADPH

Step 3) ATP is formed through photophosphorylation. (ADP gets a phosphate group added to it creating ATP)

Step 4.) The NADPH and the ATP created here go on to fuel the reactions in the second part of photosynthesis - The Calvin Cycle

5. The Calvin cycle is a metabolic process that uses the carbon from carbon dioxide, along with energy in the form of ATP, to produce sugar.
A G3P molecule contains three fixed carbon atoms, so it takes two G3Ps to build a six-carbon glucose molecule. It would take six turns of the cycle.

6. To help synthesize carbohydrates for energy

7. In fixation, the first stage of the Calvin cycle, light-independent reactions are initiated; CO2 is fixed from an inorganic to an organic molecule. In the second stage, ATP and NADPH are used to reduce 3-PGA into G3P; then ATP and NADPH are converted to ADP and NADP +, respectively
6 0
3 years ago
Maria are flat areas on the moon’s surface.<br> true or false ??
jolli1 [7]
True, maria are dark, smooth, <em>flat </em>surfaces on the moon.

hope this helps:)
5 0
3 years ago
Read 2 more answers
Do water and methane have different freezing/melting, and boiling/condensation points?
zvonat [6]

Answer

Yes

Explanation:

water freezes at 32f and methane freezes at -295.6°F

5 0
3 years ago
According to the author, what is the main reason for the decrease in trillium in the forest?
yaroslaw [1]

Sample Response: The main reason for the decrease in trillium is the large number of deer in the forest that are eating the trillium. The author cites a research study performed by scientists as evidence to support her claim. In this study, researchers planted two fields, each containing garlic mustard and trillium. One was left open to deer, and the other was fenced off. Scientists kept track of the fields for several years. They found that trillium was able to regain much of its original space in the protected field. In the unprotected field, there was still more garlic mustard because the deer ate the trillium. The author also states that similar research studies have been conducted in many forests across the United States, and they all reveal similar results.

7 0
3 years ago
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