RE-NEET Zoology Class 11 Questions
45 questions
The number of vertebrae in a human is ________.
Which one of the following statements is incorrect?
Given below are two statements:
Statement I: The class name Reptilia refers to creeping or crawling mode of locomotion.
Statement II: All organisms belonging to Reptilia have three chambered heart.
In the light of the above statements, choose the most appropriate answer from the options given below:
Which of the following statements related to pituitary gland are correct? (a) It is divided anatomically into adenohypophysis and neurohypophysis (b) It secretes follicle stimulating hormone (c) It secretes melanocyte stimulating hormone (d) It does not secrete prolactin Choose the correct answer from the options given below:
Match List-I with List-II.
In water, frogs respire using ________.
Arrange the following elements in descending order of their contribution to percentage weight of the human body. (a) Oxygen (b) Carbon (c) Hydrogen (d) Nitrogen Choose the correct answer from the options given below:
Which of the following is not a characteristic of chordates?
Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?
The number of action potentials generated by sino-arterial node (SAN) in a healthy human is _______ per minute.
Which of the following statements is incorrect ?
Which of the following is not a part of human central neural system ?
In frogs, the number of pairs of cranial nerves arising from the brain are ________.
Given below are two statements :
Statement I: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry.
Statement II: In phylum Echinodermata, both adults and larvae are radially symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below :
The opening between the right atrium and the right ventricle is guarded by ________.
Which of the following statements about the reabsorption process in Henle’s loop are correct ? (a) The descending limb of Henle’s loop is permeable to water but almost impermeable to electrolytes. (b) Urine gets concentrated in Henle’s loop. (c) Reabsorption of Na⁺ and water takes place in Henle’s loop. (d) Active or passive transport of electrolytes occurs in the ascending limb of Henle’s loop.
Which of the following is the correct order of arrangement of vertebrate column from the head to toe ?
Sponges exchange O₂ with CO₂ by
Match List-I with List-II.
Muscle contraction is initiated by a signal sent by the central nervous system by the release of ______.
Which of the following is a nucleotide?
Ligases is a class of enzymes responsible for catalysing the linking together of two compounds. Which of the following bonds is not catalysed by it?
Q
Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?
Match List-I with List-II:
A person with blood group ARh⁻ can receive the blood transfusion from which of the following types?
Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as:
Match List-I with List-II.
Match List-I with List-II.
Which of the following statements is correct about the type of junction and their role in our body?
Match List-I with List-II.
Which of the following is/are present in female cockroach?
A. Collateral gland
B. Mushroom gland
C. Spermatheca
D. Anal style
E. Phallic gland Choose the most appropriate answer from the options given below:
Open Circulatory system is present in:
In which of the following connective tissues, the cells secrete fibres of collagen or elastin?
Which of the following pairs is an incorrect match?
Match List-I with List-II:
Match List-I with List-II:
Diuresis is prevented by:
‘Lub’ sound of Heart is caused by the
Identify the wrong statements:
A. Erythropoietin is produced by juxtaglomerular cells of the kidney
B. Leydig cells produce Androgens
C. Atrial Natriuretic factor, a peptide hormone is secreted by the seminiferous tubules of the testes
D. Cholecystokinin is produced by gastrointestinal tract
E. Gastrin acts on intestinal wall and helps in the production of pepsinogen Choose the most appropriate answer from the options given below:
Given below are two statements:
Statement I: Concentrated urine is formed due to counter current mechanism in nephron.
Statement II: Counter current mechanism helps to maintain osmotic gradient in the medullary interstitium.
In the light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Members of subphylum vertebrates possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult.
Reason R: Thus all chordates are vertebrates not all vertebrates are chordates.
In the light of the above statements choose the correct answer from the option given below.
Select the correct statements regarding mechanism of muscle contraction.
A. It is initiated by a signal sent by CNS via sensory neuron.
B. Neurotransmitter generates action potential in the sarcolemma.
C. Increased Ca²⁺ level leads to the binding of calcium with troponin on action filaments.
D. Masking of active site for actin is activated.
E. Utilising the energy from ATP hydrolysis to form cross bridge.
Match List I with List II:
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: During the transportation of gases, about 20-25 percent of CO₂ is carried by Haemoglobin as carbamino-haemoglobin.
Reason R: This binding is related to high pCO₂ and low pO₂ in tissues.
In the light of the above statements, choose the correct answer from the options given below.