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Sedaia [141]
3 years ago
8

A plant is treated with a chemical that blocks the flow of electrons between photosystem II and photosystem I, such that protons

are not transported from the stroma into the thylakoid compartment. What is the effect of this chemical on photosynthesis?
Biology
1 answer:
Sindrei [870]3 years ago
6 0

Answer:

Reduce or stop the production of energy molecule i.e ATP

Explanation:

Proton is an essential ingredient to carry out light reactions successfully and the proton requirement is fulfilled through the proton gradient formed along the membrane. A chemical that blocks the flow of electrons thereby hindering the flow of proton will adversely affect the electron transport chain reactions thereby causing reduced/no conversion of ADP to ATP.  

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Histologically, what feature is shared by all tonsils but is absent in other malt nodules?
ira [324]

Crypts Feature is shared by all tonsils but is absent in other malt nodules. Anatomical structures called crypts are deep, narrow incisions into larger structures. The Crypts of Lieberkühn are a typical type of anatomical crypt.

It is not the only form of the tonsil, though; some tonsils also feature crypts. The deep regions of these tonsils are accessible to the outside world through these crypts, making them more susceptible to infection. An intestinal gland, also known as a Lieberkühn crypt or intestinal crypt, is a gland that can be found in the small and large intestines' intestinal epithelium between villi (or colon).

The epithelium that covers the glans and intestinal villi are made up of a variety of cells, including enterocytes (which absorb water and electrolytes), goblet cells (which secrete mucus), enteroendocrine cells (which secrete hormones), cup cells, tuft cells, and Paneth cells (which secrete antimicrobial peptides) and stem cells at the base of the gland.

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4 0
1 year ago
This graph shows the variation in birth weights in a specific population of humans.
lorasvet [3.4K]

Answer:

There is a moderate variation in birth weight.

Explanation:

8 0
3 years ago
What is the purpose of the folded inner membrane in mitochondria
Andrei [34K]

Answer:

Increase the membrane surface area which creates more work space

Explanation:

Mitochondrion (Plural-mitochondria) is referred to as the powerhouse the the cell because it is the site of ATP (energy rich compound) synthesis in the cell. Mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes; the outer membrane, which sheds the organnelle and contains it like a skin and the inner membrane, which folds over many times and creates a layered invagination called CRISTAE.

The folding of the inner membrane increases the membrane surface area inside the organnelle. Since many of the chemical reactions e.g. Cellular respiration (ETC and Chemiosmosis) occur in the inner membrane, the increased surface area creates more space for the reactions to occur.

It is just reasonable that the more the space, the more the work that can be done.

3 0
3 years ago
What is happing to the temperature during each phase change
NNADVOKAT [17]

the heat is used to break the bonds between the ice molecules as they turn into a liquid phase. Since the average kinetic energy of the molecules does not change at the moment of melting, the temperature of the molecules does not change.

5 0
3 years ago
Analicen el cariotipo humano y den dos ejemplos de pares de cromosomas metacéntricos, dos ejemplos de pares telocéntricos y dos
wolverine [178]

Analyze the human karyotype and give two examples of pairs of metacentric chromosomes, two examples of telocentric pairs, and two examples of acrocentric pairs.

Answer: The test that is conducted to evaluate and identity the shape,size and number of chromosomes in cells of organism is called the Karyotype.

Metacentic chromosomes   are X -  shaped chromosomes. They have centromere at the middle, which makes the arms of the chromosomes equal in length. Therefore any type of chromosomes with equal length of arms is said  to be Metacentic.  Thus  chromosomes  on position  1,13, 16 , 19  and 20 are examples.

When a pair of chromosomes showed  a regular segregation at anaphase  of meiosis, they are said to be telocentric. They are type of chromosomes in which the centromere are located  at the terminal ends of the chromosomes, with the telemeres extending from theses ends.Hence during segregation, the ends of  telocentric chromosomes are orientated towards the poles of the cells. example is the alphabets ''i'' shaped chromosomes in mice and 29 pairs autosomes  in Angora goats.

When the centromere is located in such a way that one arm lenght of a chromosomes is longer than the other, then this is called acrocentric. Example is chromosome 21 of down syndrome.others are 13, 14, 15, 22, and Y-chromosomes.

Explanation:

4 0
3 years ago
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