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Rom4ik [11]
2 years ago
12

On an electrophoresis gel, band B is closer to the positive end of the gel than is band A. Which of the following statements is

true?
A. The DNA fragments in band B were smaller than those in band A.
B. Band A and band B contain the same DNA fragments.
C. Band A moved faster than band B.
D. The DNA in B is more positively charged than the DNA in A.​
Biology
1 answer:
ZanzabumX [31]2 years ago
4 0

Answer:

D. The DNA in B is more positively charged than the DNA in A.​

D. The DNA in B is more positively charged than the DNA in A.​

Explanation:

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Klinefelter's syndrome is a result of which of the following nondisjunction mutations
mylen [45]

Klinefelter's syndrome is a result of chromosomal nondisjunction mutations.

<h3>What is Klinefelter's syndrome?</h3>

Klinefelter's syndrome is a result of the presence of an extra X chromosome in germinal cells.

In genetics, this type of mutation is referred to as chromosomal nondisjunction (aneuploidies).

In conclusion, Klinefelter's syndrome is due to chromosomal nondisjunction.

Learn more about chromosomal nondisjunction here:

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6 0
2 years ago
Select all of the true statements regarding non‑shivering thermogenesis.
lora16 [44]

Answer:

a, b, d y e

Explanation:

We can define thermogenesis as the method of production of lime or temperature that a living body generates, in biology it is studied that this does not occur in all animals, but is seen in so-called warm blood and some plants, there are three types of processes identified in animals:

NEAT: defined as thermogenesis that occurs without the presence of physical activity

DIT: defined as the thermogenesis that occurs with physical activity

EAT: defined as the thermogenesis that occurs with the consumption of food or diet

Thermogenesis under the thermogenin protein found in brown adipose tissue produces a disengagement of protons within the mitochondria, prevents ATP synthesis and is capable of inducing temperature with the flow of protons, it also intervenes by increasing glycolysis, lipogenesis and gluconeogenesis with which its final result in these processes is the production of energy. The effect of the sympathetic nervous system and thyroid hormones that can balance heat production without generating abnormal movements such as tremor is also recognized.

Thus we deduce that:

electron transport allows heat flow without causing tremors

Thermogenin is involved in allowing protons to enter the mitochondria and the ATP production process is carried out.

hydrolysis of fatty acids occurs in the presence of norepinephrine

in brown adipocytes ATP synthase can be avoided

6 0
3 years ago
Water and dissolved minerals located in the cell walls and intercellular spaces of the root cortex are in the ___________ (sympl
SSSSS [86.1K]

Answer:

1. Apoplastic

2. Symplastic

3. Symplastic

4. Apoplastic

Explanation:

The interconnected porous cell walls of plant cells make apoplast along which water is allowed to move freely. Symplast refers to the path made up of interconnected cytoplasm of many plant cells connected by plasmodesmata. Therefore, water and dissolved minerals enter the root cortex from the epidermis in the solution can move through symplast and apoplast till endodermis.

Water and dissolved minerals present in the cytoplasm of cortical cells move from one cell to next via plasmodesmata (the symplast) while the ones present in their cell walls and intercellular space move through apoplast. The presence of casparian strips in the endodermal cell wall does not allow the movement of water and minerals through the apoplast.

5 0
2 years ago
Which of these is an example of infill?
jeka57 [31]

Answer:

what are the examples???

Explanation:

..

5 0
3 years ago
Read 2 more answers
Which of the following ways are leftover neurotransmitters cleaned up if they
Alisiya [41]

Answer:

The correct answer is -

the neurotransmitters are broken down in the synapse

The presynaptic neuron absorbs the neurotransmitters

Explanation:

The termination of the neurotransmitters is essential as if they can cause harm by continuing the stimulus effect on the muscles or cells. To clean up these neurotransmitters there are two ways- Degradation of neurotransmitters with the help of enzymes in the synapses or synaptic cleft and the presynaptic neurons absorbs or suck up neurotransmitters. The neuron (presynaptic neuron) is that releases the neurotransmitter like dopamine, serotonin, is the one that re-uptake it.

This reuptake is done by transporter proteins that are are symporters in nature as these proteins pump neurotransmitters as well as ions back into the neuron.

5 0
3 years ago
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