During symport, two different molecules move across the membrane:
| 1. | in same direction with the help of different carriers located at a common site |
| 2. | in same direction with the help of different carriers located at different sites in the same cell |
| 3. | in same direction with the help of same carrier |
| 4. | in opposite direction with the help of same carrier |
Subtopic: Means of Transport: Passive |
52%
Level 3: 35%-60%
NEET - 2023
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Which classes of algae possess pigment fucoxanthin and pigment phycoerythrin, respectively?
1. Phaeophyceae and Chlorophyceae
2. Phaeophyceae and Rhodophyceae
3. Chlorophyceae and Rhodophyceae
4. Rhodophyceae and Phaeophyceae
1. Phaeophyceae and Chlorophyceae
2. Phaeophyceae and Rhodophyceae
3. Chlorophyceae and Rhodophyceae
4. Rhodophyceae and Phaeophyceae
Subtopic: Pheophyceae: Brown Algae | Rhodophyceae: Red Algae and Importance of Algae |
90%
Level 1: 80%+
NEET - 2023
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In which disorder, change of single base pair in the gene for beta globin chain results in change of glutamic acid to valine?
| 1. | Thalassemia | 2. | Sickle cell anemia |
| 3. | Haemophilia | 4. | Phenylketonuria |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
85%
Level 1: 80%+
NEET - 2023
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For chemical defense against herbivores, Calotropis has
| 1. | Cardiac glycosides | 2. | strychnine |
| 3. | toxic ricin | 4. | distasteful quinine |
Subtopic: Population Interactions: Predation |
87%
Level 1: 80%+
NEET - 2023
Hints
Consider the following tissues in the stellar region of a stem showing secondary growth.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Arrange these in the correct sequence of their position from pith towards cortex.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem
Arrange these in the correct sequence of their position from pith towards cortex.
| 1. | (A), (B), (D), (C) | 2. | (B), (A), (C), (D) |
| 3. | (A), (B), (C), (D) | 4. | (B), (A), (D), (C) |
Subtopic: Dicot Stem |
Level 3: 35%-60%
NEET - 2023
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Which of the following mineral ion is not remobilized in plants?
| 1. | Potassium | 2. | Calcium |
| 3. | Nitrogen | 4. | Phosphorus |
Subtopic: Mineral Deficiency & Toxicity |
65%
Level 2: 60%+
NEET - 2023
Hints
Which out of the following statements is incorrect?
| 1. | Grana lamellae have both PS I and PS II |
| 2. | Cyclic photophosphorylation involved both PS I and PS II |
| 3. | Both ATP and NADPH + H+ are synthesised during non-cyclic photophosphorylation |
| 4. | Stroma lamellae lack PS II and NADP reductase |
Subtopic: Light Reaction: Electron Transport |
80%
Level 1: 80%+
NEET - 2023
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Match List - I with List - II
Choose the correct answer from the options given below:
| List - I | List - II | ||
| (A) | Nitrococcus | (I) | Denitrification |
| (B) | Rhizobium | (II) | Conversion of ammonia to nitrite |
| (C) | Thiobacillus | (III) | Conversion of nitrite to nitrate |
| (D) | Nitrobacter | (IV) | Conversion of atmospheric nitrogen to ammonia |
| Options: | (A) | (B) | (C) | (D) |
| 1. | III | I | IV | II |
| 2. | IV | III | II | I |
| 3. | II | IV | I | III |
| 4. | I | II | III | IV |
Subtopic: Nitrogen Fixation |
66%
Level 2: 60%+
NEET - 2023
Hints
In angiosperms, the correct sequence of events leading to the formation of female gametophyte in the ovule is:
Choose the correct answer from the options given below:
| A. | 3 successive free nuclear divisions in functional megaspore. |
| B. | Degeneration of 3 megaspores |
| C. | Meiotic division in megaspore mother cell |
| D. | Migration of 3 nuclei towards each pole. |
| E. | Formation of a wall resulting in seven celled embryosac. |
| 1. | (A), (B), (C), (D), (E) | 2. | (C), (E), (A), (D), (B) |
| 3. | (B), (C), (A), (D), (E) | 4. | (C), (B), (A), (D), (E) |
Subtopic: Pistil: Ovule | Pistil: Female Gametophyte |
77%
Level 2: 60%+
NEET - 2023
Hints
Which of the following statements is true?
| 1. | All pteridophytes exhibit haplo-diplontic pattern. |
| 2. | Seed bearing plants follow haplontic pattern. |
| 3. | Most algal genera are diplontic. |
| 4. | Most bryophytes do not have haplo-diplontic life cycle. |
68%
Level 2: 60%+
NEET - 2023
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