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3 years ago

How does a catalyst work? using these options...

Biology

2 answers:

Gelneren [198K]3 years ago

8 0

Answer: D) By decreasing the activation energy of a reaction

A catalyst is a substance that speed up the rate of chemical reaction without affecting the product of the reaction. They only affect the rate of reaction not the yield of reaction.

Catalyst provide an alternative reaction pathway that has lower activation energy than that of uncatalysed reaction. It increases the frequency of collision and because of these greater collision which lowers the activation energy of the reaction.

nlexa [21]3 years ago

6 0

D is the answer (activation energy)

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Which statement is true? Bronchitis can result in hoarseness. Cystic fibrosis is a genetic disorder that causes thick mucus secr

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<u>Answer</u>: Cystic fibrosis is a genetic disorder that causes thick mucus secretions.

<u>Explanation</u>:

<em>Cystic fibrosis</em> is a genetic disorder caused by mutations in a gene that makes a protein called CFTR (cystic fibrosis transmembrane regulator).
The CFTR protein normally functions as a channel for transport of chloride ions in cells responsible for mucus production.
A person suffering from cystic fibrosis produces abnormal CFTR protein or no CFTR protein at all.
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3 years ago

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What part of an experiment is used to show that results are due to the condition being tested

I am Lyosha [343]

It will be Control. Part of the experiment used to show that the results of an experiment is really due to the conditions being tested.

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3 years ago

Which is not a cause of noninfectious diseases?

Varvara68 [4.7K]

The answer is A, and this is true because trauma can not be transmitted or caught by humans or animals but a virus , faulty nutrition & congenital defects can. hope this helps :)

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2 years ago

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A horse and a donkey mate to produce an offspring that is not fertile. What explains the relationship between a horse and a donk

Misha Larkins [42]

Answer:D

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2 years ago

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Two dihybrid pea plants (both tall and with purple flowers) are mated. The cross resulted in 9866 progeny, of which 5550 were ta

d1i1m1o1n [39]

Answer:

<h2>616 Short with white flower </h2><h2>1850 Tall with white flower </h2><h2>1850 Short with purple flower</h2>

Explanation:

A dihybrid cross is in which two genes of two different traits are crossed

As given, two dihybrid pea plants (tall with purple flower) are mated, resulting 5550 out of 9866 were tall with purple.

T= tall

t= short,

P= purple,

p= white;

So genotype of parents are TtPp ; T is dominant over t, P is dominant over p.

Crossing between two parens= TtPp × TtPp

so gamets are = parent 1: TP, Tp, tP, tp and parent 2: TP, Tp, tP, tp

Hence the four different gametes formed.

Now arrange the gametes on the top and left side of a Punnett square it'll genotypically results into different combinations, by which phenotypic ratios can be calculated.

offspring are = TTPP, TTPp, TtPP, TtPp....................TTpp, Ttpp.....ttPP, ttPp.......ttpp

(T_P_)= Tall with purple flower,

(T_pp)= tall with white flower,

(ttP_)= short with purple flower,

(ttpp)= short with white flower.

so it show 12:3:3:1 ratio'

Phenotypic classes are:

616 Short with white flower

1850 Tall with white flower

1850 Short with purple flower

8 0

3 years ago