Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryo’s development.
(A) tell individual genes both when to become active and when to remain
(B) tell individual genes both at which time they should become active or should remain
(C) tells individual genes both when to become active or remain
(D) tells individual genes both when to become active or when to remain
(E) will tell an individual gene both about when it should become active and remain
one of the substances that tell/tells, one of construction singular/plura
one of the substances
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A for me.
'One of the substances' means that scientists expect or believe that there are more than one, so plural is necessary.
B is awkward and not parallel.
C singular
D singular
E will?? When? Doesn't make sence.
Anybody else? Pls post OA.
'One of the substances' means that scientists expect or believe that there are more than one, so plural is necessary.
B is awkward and not parallel.
C singular
D singular
E will?? When? Doesn't make sence.
Anybody else? Pls post OA.
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here's an old thread for the same question -
https://www.beatthegmat.com/biologists-believe-that-they-have-found-one-of-the-substance-t10461.html
https://www.beatthegmat.com/biologists-believe-that-they-have-found-one-of-the-substance-t10461.html
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Rule1: One of the X "that" means that the verb should agree with X
X in this case is substances so the verb will be "tell"
Keep A and B
Rule2: parallelism is required around both. The correct idiom is both X and Y where X and Y need to be parallel
Keep A
so from rule1 and rule2 we get correct ans A
X in this case is substances so the verb will be "tell"
Keep A and B
Rule2: parallelism is required around both. The correct idiom is both X and Y where X and Y need to be parallel
Keep A
so from rule1 and rule2 we get correct ans A