Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which group of organisms appears to be more adversely affected by competition, according to the text?
The text notes: 'In general, herbivores and plants appear to be more adversely affected by competition than carnivores.'
The example of visiting flamingoes and resident fishes competing for zooplankton in shallow South American lakes illustrates that:
The text states: 'Firstly, totally unrelated species could also compete for the same resource. For instance, in some shallow South American lakes, visiting flamingoes and resident fishes compete for their common food, the zooplankton in the lake.'
A key characteristic of competition, as opposed to predation or parasitism, is that:
The summary section explicitly states that in competition, 'both species suffer'.
Interference competition is characterized by:
The text defines interference competition: 'in interference competition, the feeding efficiency of one species might be reduced due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant.'
Which of the following describes the cellular location where pyruvate is transported for its conversion to Acetyl CoA in aerobic respiration?
According to the NCERT text, 'For aerobic respiration to take place within the mitochondria, the final product of glycolysis, pyruvate is transported from the cytoplasm into the mitochondria.' Specifically, Pyruvate, after it enters the mitochondrial matrix, undergoes oxidative decarboxylation.
The conversion of pyruvic acid to Acetyl CoA is an example of:
The NCERT states, 'Pyruvate, which is formed by the glycolytic catabolism of carbohydrates in the cytosol, after it enters mitochondrial matrix undergoes oxidative decarboxylation.' This process involves both oxidation (reduction of NAD+) and decarboxylation (release of CO2).
The Pyruvate Dehydrogenase complex requires the participation of several coenzymes. Which of the following is explicitly mentioned in the NCERT text as a required coenzyme for this complex?
The NCERT states, 'The reactions catalysed by pyruvic dehydrogenase require the participation of several coenzymes, including NAD+ and Coenzyme A.' FAD+ is involved later in the TCA cycle, and ATP/GTP are products or used in other steps, not coenzymes for this specific reaction.
The product 'Acetyl CoA' formed from pyruvic acid is crucial because it directly enters which metabolic pathway?
The NCERT states, 'The acetyl CoA then enters a cyclic pathway, tricarboxylic acid cycle, more commonly called as Krebs’ cycle'.
The enzyme responsible for catalyzing the oxidative decarboxylation of pyruvic acid is:
The NCERT clearly states, 'Pyruvate... undergoes oxidative decarboxylation by a complex set of reactions catalysed by pyruvic dehydrogenase.'
Which of the following is NOT a direct product of the Pyruvate Dehydrogenase complex reaction (from one molecule of pyruvic acid)?
The reaction shows: Pyruvic acid + CoA + NAD+ $\xrightarrow{\text{Pyruvate dehydrogenase}}$ Acetyl CoA + CO2 + NADH + H+. ATP is not directly produced in this step; it is generated later through oxidative phosphorylation using the NADH. The question specifically asks for DIRECT product for one molecule of pyruvic acid. So, ATP is not a direct product.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Botany question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.