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Karo-lina-s [1.5K]
3 years ago
14

What do researchers think is one cause of memory impairment related to growing older

Biology
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0

Answer:

Vitamin B12 deficiency.

Explanation:

Vitamin B12 protects the neurons and is vital to healthy brain functioning. In fact, a lack of B12 can cause permanent damage to the brain. Older people have a slower nutritional absorption rate, which can make it difficult for you to get the B12 your mind and body need.  If aging adults address a vitamin B12 deficiency early, the memory loss could be reversed. Treatment is available in the form of a monthly injection.

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Watson and crick were the first to suggest that dna is
grin007 [14]

Answer:

they suggested that DNA could make exact copies of itself

Explanation:

The two had shown that in DNA, form is function: the double-stranded molecule could both produce exact copies of itself and carry genetic instructions.Watson and Crick developed their ideas about genetic replication in a second article in Nature.

7 0
2 years ago
Which of the following is the correct order of steps in the scientific method?
mariarad [96]

Answer:

C

Explanation:

herp derp herp derp herp derp

5 0
3 years ago
Read 2 more answers
In muscle cells, fermentation produces _____. In muscle cells, fermentation produces _____. carbon dioxide, ethanol, and NAD car
nydimaria [60]

Answer:

In muscle cell, fermetation produces <u>"lactate and NAD"</u>

<u>In fermentation Pyruvate is reduced and __NADH__ is oxidized.</u>

Explanation:

Muscle cells perform lactic acid fermentation when enough oxygen is not available to support aerobic cellular respiration. The process of glycolysis forms two molecules of pyruvate from one glucose molecule and uses NAD+ as electron acceptor. During lactic acid fermentation, pyruvate is reduced into lactate and NADH serves as an electron donor. The final products are lactate and NAD+. The reaction is catalyzed by lactate dehydrogenase enzyme. The NAD+ produced by fermentation is required to continue the process of glycolysis.

6 0
2 years ago
A stop enzyme is used in protein synthesis to stop tRNA from carrying messages from the DNA to the ribosome.
zmey [24]

A stop enzyme is used in protein synthesis to stop tRNA from carrying messages from the DNA to the ribosome.
True
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6 0
2 years ago
The diploid number for a lily whose pollen contains 12 chromosomes would be _________ and is produced when the pollen, containin
kirza4 [7]
The answers would be 24 and fertilises. 

Pollen is the male gamete of lily, which is a haploid cell, with only half the chromosomes of the normal diploid ones. Therefore, if the haploid gamete has 12 chromosomes, so the diploid would be 12+12 which makes 24. 

The egg is also a gamete of lily, but it's a female gamete. It is also a haploid cell, with only 12 chromosomes which is given in the question. So, when the sperm fuses and fertilises the egg, the zygote would have 24 chromosomes which is formed by 2 haploid gametes. 
8 0
3 years ago
Read 2 more answers
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