_____ succession involves a pioneer species

Which molecule is the final electron acceptor for electrons from photosystem I? a. Oxygen b. Chlorophyll in photosystem II c. Ca

Mumz [18]

The molecule which is the final electron acceptor for electrons from photosystem I is (d) NADP⁺.

Photosystem I is the protein complex involved in the process of photosynthesis. It captures the light energy to mediate the transfer of electrons from a series of electron transporters. It is involved in non-cyclic as well as cyclic photophosphorylation.

NADP⁺ is the Nicotinamide Adenine Dinucleotide Phosphate. It acts as a coenzyme. It is an important constituent in various anabolic reactions like Calvin cycle, lipid and nucleic acid syntheses, etc. The oxidized form of NADP⁺ is NADPH. It is present in organisms of almost all kinds.

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3 0

1 year ago

Evaporating water takes what with it<br> A) wind<br> B)heat<br> C)pressure<br> D)water

krok68 [10]

The answer is d or c but I think it’s b. Hope this helps!

8 0

3 years ago

How is the definition of "lipid" different from the types of definitions used for other biomolecules, such as amino acids, nucle

MariettaO [177]

The term "lipid" does not specify a particular chemical structure. Whereas one can write a general formula for an amino acid, nucleic acid, or protein, lipids are much more chemically diverse. Compounds are categorized as lipids based on their greater solubility in organic solvents than in water.

8 0

3 years ago

In summer squash, white fruit (H) is dominant over yellow (h), and the flattened disc-shaped fruit (D) is dominant over the sphe

Alekssandra [29.7K]

Answer:

a. It is a dihybrid cross

b. 0%

c. 0%

d. 0%

e. 100%

f. 0%

g. 0%

Note: Answers are given assuming that hhRD = hhDD

Explanation:

a. The cross, HHdd x hhDD is a dihybrid cross involving two traits: fruit colour and fruit shape

2. Gametes produced in the cross are given below:

for HHdd= Hd and Hd

For hhDD = hD and hD

Offspring produced in the cross:

All HhDd, which represents white and the flattened disc-shaped fruit white since They are both dominant characters.

b. Percentage of the offspring from this cross expected to have the HHDD genotype = 0%

c. Percentage of the offspring from this cros expected to have the hhDD genotype = 0%

d. Percentage of the offspring from this cross expected to have the HhDd genotype = 0%

e. Percentage of the offspring from this cross are expected to produce white and disc-shaped fruits (HHDD or HhDD or HhDd) = 100%

f. Percentage of the offspring from this cross expected to produce white and spherical fruits (HHdd or Hhdd) = 0%

g. Percentage of the offspring from this cross expected to produce yellow and disc-shape (hhDD or hhDd) = 0%

8 0

3 years ago

if a cell increases the activity of its actin severing proteins, will it lead in the short term to more or less actin polymer ma

marta [7]

More polymer will form if the concentration of free actin monomers is higher than the Cc at both the plus and minus ends.

Less polymer will form if the concentration of free actin monomers is lower than the Cc at both the plus and minus ends.

Actin polymerization encourages FAK and Src to activate small G proteins by signalling to GEFs and GTPases (e.g., Rho and Rac). The actomyosin network is then forced to develop as a result of G proteins' induction of cytoskeleton-regulating proteins.

What stops cells from forming actin polymers?

Actin monomer is sequestered by monomer-binding proteins, reducing its availability for polymerization. As a result, actin does not polymerize when monomer-binding proteins are present in stoichiometric levels.

Q. If a cell increases the activity of its actin severing proteins, will it lead in the short term to MORE or LESS actin polymer mass? Chose the most accurate answer.

Increased severing activity will result in LESS polymer under any conditions.

Increased severing activity will result in NO CHANGE in the total amount of polymer under any conditions. It simply results in a larger number of smaller filaments.

Increased severing activity will result in MORE polymer under any conditions.

If the concentration of free actin monomers is below the Cc for both the plus and minus ends, then MORE polymer will result. If the concentration of free actin monomers is above the Cc for both the plus and minus ends, then LESS polymer will result.

If the concentration of free actin monomers is above the Cc for both the plus and minus ends, then MORE polymer will result. If the concentration of free actin monomers is below the Cc for both the plus and minus ends, then LESS polymer will result.

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4 0

1 year ago