The DNA molecule is composed of two long complementary chains of nucleotides. The complementary DNA sequence of CGTA is GCAT.
The DNA molecule is composed of two antiparallel strands of nucleotides linked together by hydrogen bonds.
In DNA, there are four types of nucleotides, each containing one different nitrogenous base (i.e., Adenine, Guanine, Cytocine and Thymine).
In RNA, Thymine bases are replaced by Uracil bases.
According to the base pair rules, Adenine (A) always pairs with Thymine (T), whereas Cytosine (C) always pairs with Guanine (G).
In conclusion, the complementary DNA sequence of CGTA is GCAT.
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Explanation:
The complementary DNA strand of the sequence ATGC will be TACG. The complementary base pairing in DNA is as per the...
(B) Sunlight excites electrons in Photosystem II.
(C) It produces ATP.
(D) It produces NADPH.
(E) It produces carbohydrates through carbon dioxide fixation.
Answer:
The correct answer will be option E.
Explanation:
The non-cyclic pathway or electron transport chain is the pathway which takes place in the light reaction.
The non-cyclic pathway starts from the PSII or P680 when the sunlight excites the electrons form the from the photosystem. This high energy electron is transferred to the higher energy level and loses its energy on the path.
The lost energy is used to form the ATP and NADPH which are used later in the formation of glucose during the dark reaction.
Thus, option E is the correct answer.
In the noncyclic electron pathway of photosynthesis, electrons are not boosted to a higher energy level in Photosystem I.
The statement that is NOT true about the noncyclic electron pathway is (A) Electrons are boosted to higher energy level in Photosystem I.
The noncyclic electron pathway is an important part of the light-dependent reactions of photosynthesis. In this pathway, electrons from photosystem II are excited by sunlight and transferred to photosystem I, where they are further excited to a higher energy level. This pathway ultimately produces ATP and NADPH, which are then used in the light-independent reactions to produce carbohydrates through carbon dioxide fixation.
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Answer: Exergonic reaction; Endergonic reaction
In coupled reactions, the energy released by an exergonic reaction is used to drive an endergonic reaction. ATP breakdown is often coupled to cellular reactions that require an input of energy.
Explanation:
Cellular reactions include Exergonic and endergonic reactions. An exergonic reaction is one that occurs spontaneously and brings about the release of energy (in form of ATP). On the other hand, an endergonic reaction proceeds only with the input of energy.
Thus, exergonic reactions are usually coupled to endergonic reactions
In coupled reactions, the energy from an energy-releasing exergonic reaction, like the breakdown of ATP, is used to drive an energy-requiring endergonic reaction. These reactions usually occur together in a cell.
In coupled reactions, the energy released by a exergonic reaction is used to drive an endergonic reaction. An exergonic reaction is a chemical reaction where energy is released, often in the form of ATP (Adenosine Triphosphate). On the other hand, an endergonic reaction requires energy to proceed.
In a cell, these types of reactions often happen together (or are coupled) so that the energy released by an exergonic reaction, like the breakdown of ATP, gets immediately used to power an endergonic one, such as the synthesis of cellular components or the transport of molecules across the cell membrane.
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Answer: True
Explanation: After a while the muscles that control your pupil size weakens which leads them to be less responsive to changes in light. Which is why older people need more light go read than a younger person does.
With age, the muscles in the iris, which control the pupil size, tend to be less responsive,leading to smaller pupils. This is a normal age-related change, but sudden drastic changes in vision should be checked by a healthcare provider.
The statement that older people tend to have smaller pupils is true. Age-related changes in the human body include alterations in the eyes and the size of the pupils especially. With age, the muscles in the iris that control the size of the pupil become less responsive, leading to smaller pupils. This can limit the amount of light that can enter the eye, thus affecting vision especially in low-light conditions.
Explanation in 100 words: The iris is a circular band of muscle that controls the size of the pupil. Aging often causes these muscles to lose some of their strength and flexibility, causing the size of the pupils to decrease. Hence, it is correct to state that older individuals usually have smaller pupils than younger ones.
In conclusion, it's important to understand that most age-related eye changes are normal and do not signify a disease. However, if drastic changes in vision occur, a healthcare provider should be consulted.
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