1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
g100num [7]
3 years ago
9

A culture of Spirogyra (an autotrophic alga) is maintained in a water solution containing dissolved carbon dioxide and a source

of phosphates but lacking nitrogen compounds. A researcher determines the rates of synthesis of several organic compounds found in the Spirogyra before and after several weeks in the water solution. Which of the following graphs best illustrates a likely result of the experiment?
a. Carbohydrates: same
b. Proteins: decrease
c. Lipids: same
d. Nucleic Acids: decrease
Biology
1 answer:
professor190 [17]3 years ago
7 0

Answer:

b) Proteins: decrease

Explanation:

Out of all the biomolecules required for the survival of an organism, proteins and nucleic acids are the ones containing Nitrogen. In nucleic acids, the building blocks of DNA, nitrogen is present in the nitrogenous bases, which are Adenine, Guanine, Cytosine, Thymine, and Uracil. In the proteins, the amino acids contain the amine group or -NH₂ which forms the peptide bond   (-NH-CO-) with a carboxylic group or -COOH of the next amino acid. As the culture of <em>Spirogyra </em>is being maintained, there would be no replication of DNA, which would have required nitrogen to synthesize the new DNA strand. But, to synthesize proteins, the RNA synthesis would require to happen which would also require nitrogen. Moreover, the formation of proteins after the translation of the mRNA would have also required Nitrogen. Thus, protein level in the cells would decrease.

You might be interested in
1. How did dark matter affect the development of structures in the early universe?
-Dominant- [34]

Answer:

1. It seeded the development of galaxies

2. The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

3. Supernovae that are moving away at an accelerating rate.

Explanation:

1. How did dark matter affect the development of structures in the early universe?

It seeded the development of galaxies.

It seeded the development of quasars.

It cooled pockets of gas to form nebulae.

it became part of black holes

2. How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.

The percentage of dark matter has shrunk in scientists' estimates since the 1980s

The percentage of unknown material has grown in scientists' estimates since the 1970%

The percentage of ordinary matter has grown in scientists' estimates.

The percentage of dark energy has shrunk in scientists estimates

3. Which is evidence for the existence of dark energy?

Pulsars that seem to be moving closer at an accelerating rate.

Supernovae that are moving away at an accelerating rate.

Black holes that are expanding at a constant rate.

Galaxies that are rotating at a constant rate.

<u><em>Please don't use these answer's to cheat they are to help only.</em></u>

6 0
3 years ago
What must happen before a chemical recreation can begin?
ddd [48]

Answer:

The activation energy must be reached. The catalyst makes lower energy pathways available.

Explanation:

3 0
3 years ago
Earth’s axis passes through the_____and South Poles. It takes Earth____hours to rotate once around its axis. Earth revolves once
barxatty [35]
Earth’s axis passes through the North and South Poles. It takes Earth 24 hours to rotate once around its axis. Earth revolves once around the Sun in 365 days during a non-leap year.
8 0
3 years ago
Read 2 more answers
To investigate whether roots exert a pushing force strong enough to cause water to move up the stems plants,my question is state
SIZIF [17.4K]
1. The plant should not have leaves. To prevent transpiration from taking place

2. Plant should be well watered. Plants need water

3. Put some Vaseline to seal open gaps. This prevents water evaporation

Unfortunately I don't have the 4th one :/
4 0
3 years ago
What are the phases of Mitosis and what happens in each phase?
Norma-Jean [14]
Interphase: Chromosomes duplicate, and the copies remain attached to each other.

Prophase: In the nucleus, chromosomes condense and become visible. Spindle fibers begin to form.

Prometaphase: The nulcear membrane breaks apart, and the spindle starts to interact with the chromosomes.

Metaphase: The copied chromosomes align in the middle of the spindle.

Anaphase: Chromosomes separate into two genetically identical groups and move to opposite ends of the spindle.

Telophase: Nuclear membranes form around each of the two sets of chromosomes, they begin to spread out, and the spindle begins to break down.

Cytokinesis: The two cells split into two daughter cells, each with the same number of chromosomes as the parent cell.
3 0
2 years ago
Other questions:
  • The driving force behind gas exchange in the body is
    13·1 answer
  • When the settlers arrived in New England, many forests were turned into fields. Eventually, some fields were abandoned and then
    6·1 answer
  • If cysteine is specified by the codons UGC and UGU, what are the anticodons present on tRNAs that carry cysteine?
    8·1 answer
  • Sometimes lymph nodes must be surgically removed. Although more lymph vessels eventually grow, what result would you expect to s
    5·1 answer
  • What is the difference between normal and sickle hemoglobin at the DNA, RNA, and protein (amino acid) level?
    8·1 answer
  • Roberto has twice the mass his sister Mary has but runs at the same velocity as Mary. Will his kinetic energy be twice as much?
    7·1 answer
  • Comparing amino acid sequences in proteins has been used to determine the relatedness of organisms. Below is a graphic that show
    14·1 answer
  • Which statement best compares aerobic and anaerobic
    11·1 answer
  • Please help me <br><br> Which day had the highest relative humidity ?
    8·1 answer
  • 2. Plant anatomy is the study of the interior of a plant.<br><br><br> True<br><br> False
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!