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tensa zangetsu [6.8K]
3 years ago
8

What is a double helix

Biology
2 answers:
KengaRu [80]3 years ago
6 0
A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
xxMikexx [17]3 years ago
3 0
Two strands twisting around each other.
This is typically used to describe the structure of DNA.
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Why human with heterozygous genotype will have the dominant phenotype?
AnnZ [28]

A human with heterozygous genotype can have a dominant phenotype if one of the alleles complete mask the effects of the other.

  • Heterozygous genotype involves two different alleles, unlike homzygous genotypes in which the alleles are the same.
  • When the two alleles of an heterozygous genotype exert equal effects on one another, they are said to be codominant.
  • When one of the alleles of an heterozygous genotype incompletely exert its effects on the other allele, it is said to be incomplete dominance.
  • When one of the alleles complete dominates and masks the effects of the other allele, it is said to be dominant.

Hence, a dominant allele will always produce a dominant phenotype even if the genotype of the organism is heterozygous.

More on genotypes can be found here: brainly.com/question/14398652

5 0
3 years ago
Muscles that move the eyeball have ________ fibers.
ozzi

Muscles which are responsible for the movement of the eyeball have fast fibers. Thus, the correct option is A.

<h3>What are fast muscle fibers?</h3>

Fast-twitch muscle fibers are the muscle fibers which provide bigger and more powerful forces, however for shorter durations and fatigue quickly. They are more anaerobic with less blood supply, and hence are sometimes also referred to as white fibers or type II fibers.

Fast-twitch muscle fibers are activated by the high intensity movements which are sustained in short bursts. Examples of movements include sprints, burpees, and quick lateral movements.

Therefore, the correct option is A.

Learn more about Eyeball here:

brainly.com/question/10945999

#SPJ1

Your question is incomplete, most probably the complete question is:

Muscles that move the eyeball have ________ fibers.

A) fast

B) slow

C) intermediate

D) circular

E) All of the answers are correct.

4 0
1 year ago
How are mitochondria similar to chloroplasts? Both have many layers of membranes. Both contain molecules of chlorophyll. Both ar
lorasvet [3.4K]

Answer:

Both have many layers of membranes

Explanation:

4 0
4 years ago
A scientist observes a population of single-celled organisms at various temperatures. At extreme high temperatures and extreme l
Mila [183]

A change in temperature affects an enzyme by causing the enzyme to change it's shape.

<h3>what is an enzyme?</h3>

An enzyme is a substance that catalyzes chemical reactions.

  • Temperature is one of the major factors that aid enzymes action.

  • Increase in temperature could increase the rate of enzyme.

  • However, at a very high temperatures, the enzyme can be denatured thereby changing it shape or structure and the enzyme may no longer bind to the substrate or function effectively this will then reduce the rate of chemical reaction.

Therefore, a change in temperature i.e very high temperature can change the shape of an enzyme.

for more details kindly on change in temperature kindly check brainly.com/question/6232699

8 0
3 years ago
In photosynthesis, what are two major reaction that take place.
Vlad1618 [11]

The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.

5 0
3 years ago
Read 2 more answers
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