MCQ
In citric acid cycle first step is
  • Acetyl Co-$A$ combines with oxalo acetic acid
  • B
    Acetyl Co-$A$ combines with citric acid
  • C
    Citric acid combines with oxaloacetic acid
  • D
    Citric acid combines with malic acid

Answer

Correct option: A.
Acetyl Co-$A$ combines with oxalo acetic acid
a
In the first reaction of citric acid cycle one molecule of acetyl Co-$A$ combines with $4$ -carbon Oxalo Acetic Acid $(OAA)$ to form $6$ carbon citric acid and Co-$A$ is released

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A root hair is formed by
Coenobium means
In some pteridophytes, sporophyll form distinct compact structures called ...$A$... in ...$B$... and ...$C$... Here $A, B$ and $C$ refers to
Common cold is caused by
Restriction endonucleases are
Corolloid roots are found in
Mark the given statements True (T) or False (F).
(i) In majority of the dicotyledonous plants, the direct elongation of the radical leads to the formation of secondary root which grows inside the soil.
(ii) In monocotyledonous plants, the primary root is short lived and is replaced by a large number of roots.
(iii) In some plants like grass, Monstera and banyan tree, roots arises from parts of the plant other than the radical and are called adventitious roots.
(iv) Roots hairs are present in region of elongation.
(v) The zone proximal to region of elongation is called the region of maturation.
(vi) Tap roots of carrot, turnip and adventitious roots of sweet potato, get swollen and store food.
(vii) Hanging structure that support a banyan tree are called stilt roots.
(viii) The stems of maize and sugarcane have supporting roots coming out of the upper nodes of the stem are called stilt roots.
(ix) In some plants such as Rhizophora growing in swampy areas, many roots come out of the ground and grow vertically upwards. Such roots are called pneumatophores and help to get oxygen for respiration.
(x) The regions of the stem where leaves are born are called nodes.
(xi) Underground stems of Zaminkand, Colocasia are modified to store food in them.
(xii) Tendrils which develop from axillary buds, are slender and spirally coiled and help plants to climb.
(xiii) A lateral branch with short internodes and each node bearing a rosette of leaves and a tuft of roots is found in terrestial plants like pistia and eichhornia.
(xiv) Leaves originate from shoot apical meristems and are arranged in an acropetal order.
(xv) A typical leaf consists of three main parts: leaf base, petiole and lamina
Choose the correct option given below :-
The strongest evidence that $DNA$ is genetic material comes from
Globulins contained in human blood plasma are primarily involved in
Lenticels are formed in bark, which are