MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 13101. |
Which plant will lose its economic value, if its fruits are produced by induced parthenocarpy [CBSE PMT 1997; Pb. PMT 2004] |
| A. | Grape |
| B. | Pomegranate |
| C. | Orange |
| D. | Banana |
| Answer» C. Orange | |
| 13102. |
During meiosis in pollen mother cell the daughter cells are interconnected by passages. The whole structure is called |
| A. | Symplast |
| B. | Plasmodesmata |
| C. | Syncytium |
| D. | Coenocyte |
| Answer» D. Coenocyte | |
| 13103. |
The odd one is [CBSE PMT 1991] |
| A. | Micropyle |
| B. | Embryo sac |
| C. | Nucellus |
| D. | Pollen grain |
| Answer» E. | |
| 13104. |
Pollinia is found in which of the following plant family [AIIMS 2001] |
| A. | Asteraceae |
| B. | Myrtaceae |
| C. | Malvaceae |
| D. | Asclepiadaceae |
| Answer» E. | |
| 13105. |
Occurrence of more than four spores from a spore mother cell is called [CPMT 1986] |
| A. | Polyspermy |
| B. | Polyspory |
| C. | Polyembryony |
| D. | Polysiphony |
| Answer» C. Polyembryony | |
| 13106. |
Mature male gametophyte is made up of [RPMT 1995] |
| A. | One cell |
| B. | Two cells |
| C. | Three cells |
| D. | Four cells |
| Answer» D. Four cells | |
| 13107. |
If the developing microspore mother cells draw nourishment by contacting the tapetal cells, the type of tapetum is called |
| A. | Plasmodial tapetum |
| B. | Secretory tapetum |
| C. | Amoeboid tapetum |
| D. | Endothelium |
| Answer» C. Amoeboid tapetum | |
| 13108. |
Intine of pollen grains is composed of |
| A. | Lipid and protein |
| B. | Cellulose and pectin |
| C. | Lignin and cutin |
| D. | Pectin and lignin |
| Answer» C. Lignin and cutin | |
| 13109. |
Stalk with which ovules remain attached to placenta is called [Orissa JEE 2005] |
| A. | Funicle |
| B. | Raphe |
| C. | Hilum |
| D. | Chalaza |
| Answer» B. Raphe | |
| 13110. |
Synergids are |
| A. | Tetraploid |
| B. | Triploid |
| C. | Diploid |
| D. | Haploid |
| Answer» E. | |
| 13111. |
What is the direction of micropyle in anatropous ovule [CBSE PMT 2002] |
| A. | Left |
| B. | Right |
| C. | Upward |
| D. | Inverted |
| Answer» E. | |
| 13112. |
In Capsella meiosis takes place during [RPMT 1995] |
| A. | Development of pollen grains |
| B. | Development of egg |
| C. | Germination of zygote |
| D. | Development of embryo sac |
| Answer» E. | |
| 13113. |
The microscopic structure in flower that contains polar nuclei is [DPMT 1982; CPMT 1985] |
| A. | Only gametophyte |
| B. | Pollen tube |
| C. | Embryo sac |
| D. | None of the above |
| Answer» D. None of the above | |
| 13114. |
Tegmen develops from [CBSE PMT 1990; AFMC 1993] |
| A. | Outer integument |
| B. | Inner integument |
| C. | Chalaza |
| D. | Funicle |
| Answer» C. Chalaza | |
| 13115. |
The cells in embryo sac which act as haustoria are |
| A. | Antipodal cells |
| B. | Synergids |
| C. | Egg and synergids |
| D. | Antipodals and synergids |
| Answer» B. Synergids | |
| 13116. |
Embryo sac is [CBSE PMT 1990; Pb. PMT 1999] |
| A. | Megasporangium |
| B. | Megaspore |
| C. | Female gametophyte |
| D. | Female gamete |
| Answer» D. Female gamete | |
| 13117. |
Read the assertion and reason carefully: Assertion : Cellular endosperm is formed by both nuclear division and wall formation. Reason : It lacks haustoria. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| Answer» D. If both the assertion and reason are false | |
| 13118. |
Which of the following is not formed from procambium [Wardha 2005] |
| A. | Xylem |
| B. | Phloem |
| C. | Intrafascicular cambium |
| D. | Interfascicular cambium |
| Answer» E. | |
| 13119. |
The functional xylem of dicot tree is [AFMC 2001] |
| A. | Sap wood |
| B. | Hard wood |
| C. | Heart wood |
| D. | Autumn wood |
| Answer» B. Hard wood | |
| 13120. |
The vascular cambium in dicots is [EAMCET 1995] |
| A. | Lateral |
| B. | Apical |
| C. | Intercalary |
| D. | Secondary |
| Answer» B. Apical | |
| 13121. |
The pores present in the wall of plant's stem i.e., called [CPMT 1994] |
| A. | Lenticels |
| B. | Bark |
| C. | Dalipore |
| D. | All the above |
| Answer» B. Bark | |
| 13122. |
In dicot roots, cork cambium is derived from [MP PMT 1984] |
| A. | Epidermis |
| B. | Hypodermis |
| C. | Cortex |
| D. | Pericycle |
| Answer» E. | |
| 13123. |
In the first formed primary xylem the secondary wall thickening may be of |
| A. | Reticulate type |
| B. | Annular or helical type |
| C. | Pitted type |
| D. | Scalariform type |
| Answer» C. Pitted type | |
| 13124. |
One year's growth in length of a young woody shoot is the distance between successive |
| A. | Rings of bud scale scars |
| B. | Leaf scars |
| C. | Branches |
| D. | Axillary buds |
| Answer» B. Leaf scars | |
| 13125. |
Lenticel develops through the activity of [DPMT 1991] |
| A. | Vascular cambium |
| B. | Dermatogen |
| C. | Phellogen |
| D. | Intercalary meristem |
| Answer» D. Intercalary meristem | |
| 13126. |
The undifferentiated cells are present in |
| A. | Sepals of Geranium flower |
| B. | Cambium of oak |
| C. | Maple tree root system |
| D. | Root of Raphanus |
| Answer» C. Maple tree root system | |
| 13127. |
The trees growing in desert will [CPMT 1985] |
| A. | Show alternate rings of xylem and sclerenchyma |
| B. | Have only conjunctive tissue and phloem formed by the activity of cambium |
| C. | Show distinct annual rings |
| D. | Not show distinct annual rings |
| Answer» E. | |
| 13128. |
The cambium which produces cork is known as [BHU 1990; JIPMER 1983] |
| A. | Phelloderm |
| B. | Phellogen |
| C. | Periblem |
| D. | Periderm |
| Answer» C. Periblem | |
| 13129. |
Cambium causes growth in [AFMC 1984] |
| A. | Circumference |
| B. | Width (diameter) |
| C. | Leaves |
| D. | Length |
| Answer» C. Leaves | |
| 13130. |
After two or three years of the secondary growth, the cortex in dicot root [CPMT 1972, 84] |
| A. | Remains intact |
| B. | Is completely sloughed away |
| C. | Is largely lost |
| D. | Is converted into cork |
| Answer» D. Is converted into cork | |
| 13131. |
Cork cells are [CPMT 1982] |
| A. | Dead |
| B. | Photosynthetic |
| C. | Elongated and participate in movement |
| D. | Meristematic |
| Answer» B. Photosynthetic | |
| 13132. |
R.Q. value is less than 1 in: |
| A. | Lipids |
| B. | Organic acids |
| C. | Carbohydrates |
| D. | None of these |
| Answer» B. Organic acids | |
| 13133. |
The energy-releasing process in which the substrate is oxidised without an external electron acceptor is called: |
| A. | Fermentation |
| B. | Photorespiration |
| C. | Aerobic respiration |
| D. | Glycolysis |
| Answer» E. | |
| 13134. |
In which of the following reactions of glycolysis, a molecule of water is removed from the substrate? |
| A. | Fructose - 6 - phosphate \[\to \] Fructose 1, 6 ? bisphosphate |
| B. | 3 - phosphate glyceraldehyde \[\to \] 1, 3 - bisphosphglyceric acid |
| C. | PEP \[\to \] Pyruvic acid |
| D. | 2 - Phosphoglycerate \[\to \] PEP |
| Answer» E. | |
| 13135. |
In mitochondrial electron transport system, for every two pairs of electrons that pass from NADH molecules through a sequential series of cytochrome enzymes to molecular oxygen generate |
| A. | 3ATP |
| B. | 4 ATP |
| C. | 6 ATP |
| D. | 2 ATP |
| Answer» D. 2 ATP | |
| 13136. |
Which of the following is link between carbohydrate and fat metabolism? |
| A. | \[C{{O}_{2}}\] |
| B. | Acetyl Co-A |
| C. | Pyruvic acid |
| D. | Citric acid |
| Answer» C. Pyruvic acid | |
| 13137. |
Which one of the following is common to glycolysis as well as Kreb?s cycle in eukaryotes? |
| A. | Substrate level phosphorylation |
| B. | Photophosphorylation |
| C. | Localisation in mitochondria |
| D. | Production of \[FAD{{H}_{2}}\] |
| Answer» B. Photophosphorylation | |
| 13138. |
Which of the following is coenzyme-II? |
| A. | NAD |
| B. | NADP |
| C. | FAD |
| D. | None of these |
| Answer» C. FAD | |
| 13139. |
R.Q. in anaerobic respiration is: |
| A. | 0 |
| B. | \[\infty \] |
| C. | 1 |
| D. | 1 |
| Answer» C. 1 | |
| 13140. |
Electron transport chain is inhibited by: |
| A. | Rotenone and amytal |
| B. | Antimycin-A |
| C. | Cyanide (\[C{{N}^{-}}\]), azide (\[{{N}_{3}}^{-}\]) and carbon monoxide (CO) |
| D. | All of the above |
| Answer» E. | |
| 13141. |
The first dicarboxylic acid in Krebs' cycle is: |
| A. | Isocitric acid |
| B. | Pyruvic acid |
| C. | Oxalo acetic acid |
| D. | \[\alpha \]-ketoglutaric acid |
| Answer» E. | |
| 13142. |
A mixture containing equal quantity of germinating maize and groundnut seeds are taken. The RQ of this mixture would be |
| A. | One |
| B. | Less than one |
| C. | More than one |
| D. | Infinity |
| Answer» C. More than one | |
| 13143. |
R.Q. in anaerobic respiration is [Jipmer 1998; Wardha 2005] |
| A. | 0 |
| B. | \[\propto \] |
| C. | 1 |
| D. | > 1 |
| Answer» C. 1 | |
| 13144. |
The correct relationship of value of Respiratory Quotient is [RPMT 1997] |
| A. | Glucose symbol > Fats symbol > Organic acid |
| B. | Glucose symbol < Fats symbol < Organic acid |
| C. | Fats symbol > Glucose symbol > Organic acid |
| D. | Fats symbol < Glucose symbol < Organic acid |
| Answer» E. | |
| 13145. |
R.Q. is represented by [CBSE PMT 1988; DPMT 2003; KCET 2004] |
| A. | \[\frac{C}{N}\] |
| B. | \[\frac{C{{O}_{2}}}{{{O}_{2}}}\] |
| C. | \[\frac{{{O}_{2}}}{C{{O}_{2}}}\] |
| D. | \[\frac{N}{C}\] |
| Answer» C. \[\frac{{{O}_{2}}}{C{{O}_{2}}}\] | |
| 13146. |
Different steps in respiration are controlled by [CPMT 1980, 2002; MP PMT 1984; DPMT 1992] |
| A. | Auxin |
| B. | Sugar |
| C. | Enzyme |
| D. | Kinetin |
| Answer» D. Kinetin | |
| 13147. |
The last or terminal cytochrome in respiratory chain is [CBSE PMT 1992; RPMT 1997] |
| A. | \[Cytb\] |
| B. | \[Cyt{{a}_{3}}\] |
| C. | \[Cyta\] |
| D. | \[Cytc\] |
| Answer» C. \[Cyta\] | |
| 13148. |
Kreb's cycle is found in [AFMC 1996] |
| A. | Anaerobic respiration |
| B. | Photorespiration |
| C. | Photosynthesis |
| D. | Aerobic respiration |
| Answer» E. | |
| 13149. |
In aerobic respiration citric acid cycle takes place in [Orissa JEE 2005] |
| A. | Cytosol |
| B. | Mitochondria |
| C. | Peroxisomes |
| D. | Endoplasmic reticulum |
| Answer» C. Peroxisomes | |
| 13150. |
?Mitchell's chemiosmotic theory? belongs to |
| A. | Kreb's cycle |
| B. | Oxidative phosphorylation |
| C. | Glycolysis |
| D. | None of the above |
| Answer» C. Glycolysis | |