NEET 2020 Biology Questions

The dissolution of synaptonemal complex occurs during

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process at the end of:

Identify the correct statement with regard to G1 phase (Gap 1) of interphase.

Dissolution of the synaptonemal complex occurs during:

Match the following with respect to meiosis: Column-I a. Zygotene b. Pachytene c. Diplotene d. Diakinesis Column-II (i) Terminalization (ii) Chiasmata (iii) Crossing over (iv) Synapsis Select the correct option from the following:

Which one of the following is the most abundant protein in the animals?

Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:

Match the following: (a) Inhibitor of catalytic activity (b) Possess peptide bonds (c) Cell wall material in fungi (d) Secondary metabolite (i) Ricin (ii) Malonate (iii) Chitin (iv) Collagen Choose the correct option from the following:

Identify the basic amino acid from the following

Which of the following statements is true?

Select the correct statement:

Which of the following statements is correct?

Which of the following pairs is of unicellular algae?

Strobili or cones are found in:

Which of the following statements are true for the phylum Chordata? Statements: (a) In Urochordata notochord extends from head to tail and it is present throughout their life. (b) In Vertebrates notochord is present during the embryonic period only. (c) Central nervous system is dorsal and hollow. (d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata. Choose the correct option from those given below.

Bilaterally symmetrical and acoelomate animals are exemplified by

Match the following columns and select the correct option. Column-I (a) 6-15 pairs of gill slits (b) Heterocercal caudal fin (c) Air bladder (d) Poison sting Column-II (i) Trygon (ii) Cyclostomes (iii) Chondrichthyes (iv) Osteichthyes Choose the correct option from those given below.

Match the following columns and select the correct option. Column-I (a) Gregarious, polyphagous pest (b) Adult with radial symmetry and larva with bilateral symmetry (c) Book lungs (d) Bioluminescence Column-II (i) Asterias (ii) Scorpion (iii) Ctenoplana (iv) Locusta Choose the correct option from those given below.

Which of the following statements is correct?

Presence of which of the following conditions in urine are indicative of diabetes mellitus?

Which of the following would help in prevention of diuresis?

Cuboidal epithelium with brush border of microvilli is found in:

Which of the following statements is not correct?

Name the plant growth regulator which upon spraying on sugarcane crop increases the length of stem, thus increasing the yield of sugarcane crop

The process of growth is maximum during

Which of the following is not an inhibitory substance governing seed dormancy?

Which of the following statements is not correct?

Which of the following statements about inclusion bodies is not correct?

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

The QRS complex in a standard ECG represents:

Match the following columns (types of WBC with their functions) and select the correct option. List I (WBC) A. Eosinophils B. Basophils C. Neutrophils D. Lymphocytes List II (Function) i. Immune responses ii. Phagocytosis iii. Secrete histamine and heparin (inflammation) iv. Resist infections; associated with allergic reactions Choose the correct answer:

Ray florets have

The ovary is half inferior in:

The roots that originate from the base of the stem are:

Select the correct statement.

Identify the wrong statement with reference to transport of oxygen.

Select the correct events that occur during inspiration. (a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intrapulmonary pressure increases Choose the correct answer from the options given below:

Presence of which of the following conditions in urine are indicative of diabetes mellitus?

Which of the following would help in prevention of diuresis?

Match the following columns and select the correct option. Column-I (a) Pituitary gland (b) Thyroid gland (c) Adrenal gland (d) Pancreas Column-II (i) Grave's disease (ii) Diabetes mellitus (iii) Diabetes insipidus (iv) Addison's disease

In light reaction, plastoquinone facilitates the transfer of electrons from

The oxygenation activity of RuBisco enzyme is photorespiration leads to the formations of:

Cuboidal epithelium with brush border of microvilli is found in:

Goblet cells of alimentary canal are modified from:

Which of the following statements is correct

Which of the following is correct about viroids?

According to Robert May, the global species diversity is about: (NEET-2020)

The transverse section of a plant shows following anatomical features: Features: (a) Large number of scattered vascular bundles surrounded by bundle sheath (b) Large conspicuous parenchymatous ground tissues (c) Vascular bundles conjoint and closed (d) Phloem parenchyma absent Identify the plant material:

Which of the following statements is not correct?

Match the following columns and select the correct option. Column I (a) Floating Ribs (b) Acromion (c) Scapula (d) Glenoid cavity Column II (i) Located between second & seventh ribs (ii) Head of the Humerus (iii) Clavicle (iv) Do not connect with the sternum

The number of substrate level phosphorylations in one turn of citric acid cycle is:

In gel electrophoresis, separated DNA fragments can be visualized with the help of

Identify the wrong statement with regard to Restriction Enzymes.

Choose the correct pair from the following:

The specific palindromic sequence which is recognized by EcoRI is

Match the organism with its use in biotechnology (a) Bacillus (b) Thermus aquaticus (c) Agrobacterium tumefaciens (d) Salmonella typhimurium (i) Cloning vector (ii) Construction of first rDNA (iii) DNA polymerase (iv) Cry proteins Select the correct option from the following:

The sequence that controls the copy number of the linked DNA in the vector is termed

Which of the following statements is not true ?

Flippers of Penguins and Dolphins are examples of:

The flippers of the Penguins and Dolphins are the example of the

Embryological support for evolution was disapproved by

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action? (a) Darwin's Finches of Galapagos islands (b) Herbicide resistant weeds (c) Drug resistant eukaryotes (d) Man-created breeds of domesticated animals like dogs

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask:

Select the correct match.

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Experimental verification of the chromosomal theory of inheritance was done by

Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 X 10^9 bp, then the length of the DNA is approximately

Which of the following statements is correct? a. Adenine pairs with thymine through three H-bonds b. Adenine does not pair with thymine c. Adenine pairs with thymine through two H-bonds d. Adenine pairs with thymine through one H-bond

The first phase of translation is:

Name the enzyme that facilitates opening of DNA helix during transcription.

Which of the following statements is not correct?

Match the trophic levels (grassland ecosystem) in Column I with the correct species in Column II: Column I (a) First trophic level (b) Second trophic level (c) Third trophic level (d) Fourth trophic level Column II (i) Crow (ii) Vulture (iii) Rabbit (iv) Grass Select the correct option:

In relation to gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

Identify the wrong statement with reference to immunity.

The infectious stage of Plasmodium that enters the human body is:

Match the following diseases with the causative organism and select the correct option. Column-I (a) Typhoid (b) Pneumonia (c) Filariasis (d) Malaria Column-II (i) Wucheria (ii) Plasmodium (iii) Salmonella (iv) Haemophilus

Meiotic division of the secondary oocyte is completed:

Match the following columns and select the correct option. Column-I (a) Placenta (b) Zona pellucida (c) Bulbourethral Glands (d) Leydig cells Column-II (i) Androgens (ii) Human Chorionic Gonadotropin (HCG) (iii) Layer of the ovum (iv) Lubrication of the penis (NEET 2020)

Which of the following hormone levels will cause release of ovum (ovulation) from the graafian follicle? (NEET 2020)

Which of the following statements is not correct?

Bt cotton variety that was developed by the introduction toxin gene of Bacillus thuringiensis (bt) is resistant to:

Match the following columns and select the correct option. Column-I (a) Bt cotton (b) Adenosine deaminase deficiency (c) RNAi (d) PCR Column-II (i) Gene therapy (ii) Cellular defence (iii) Detection of HIV infection (iv) Bacillus thuringiensis (NEET 2020)

In water hyacinth and water lily, pollination takes place by: (NEET 2020)

The body of the ovule is fused within the funicle at

The plant parts which consist of two generations one within the other: (a) Pollen grains inside the anther (b) Germinated pollen grain with two male gametes (c) Seed inside the fruit (d) Embryo sac inside the ovule (A) (c) and (d) (B) (a) and (d) (C) (a) only (D) (a), (b) and (c) (NEET 2020)

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

Match the following columns and select the correct option: Column-I (a) Clostridium butylicum (b) Trichoderma polysporum (c) Monascus purpureus (d) Aspergillus niger Column-II (i) Cyclosporin-A (ii) Butyric acid (iii) Citric acid (iv) Statins Choose the correct option.

In which of the following techniques, the embryo are transferred to assist those females who cannot conceive?

Select the option including all sexually transmitted diseases. (NEET 2020)

Which of the following regions of the globe is exhibits highest species diversity?

According to Robert May, the global species diversity is about (NEET 2020)

Which of the following is not an attribute of a population?