Q. The capability of nitrogen use efficiency can be increased in crop production by
(A) Use of split application
(B) Use of nitrogen inhibitors
(C) Using the slow release of nitrogen fertilizer
(D) All of the above
Q. Which of the following is/are used as biofertilizers?
2. Blue-green algae
3. Alfalfa Choose the correct answer by the given codes.
(A) Only 2
(B) 1 and 2
(C) 1 and 3
(D) 1, 2 and 3
Q. How many chromosomes are there in humans?
Q. The number of chromosomes pairs, found in the cells of human body is
Q. Which organelle in the cell, other than the nucleus, contains DNA?
(B) Golgi apparatus
Q. Which one of the following statements is correct?
(A) Prions are the smallest freeliving cells
(B) The cell wall of Mycoplasmas is made up of amino sugars
(C) Viroids consist of singlestranded RNA molecules
(D) Rickettsias lack cell wall
Q. The reason of large-scale diversity among the organisms is
Q. Which of the following does not have sex-chromosome?
Q. How does the plant cell differ from the animal cell?
(B) Cell wall
(C) Presence of protoplasm
(D) Cell nucleus
Q. What is not found in the animal cell?
(A) Cell wall of cellulose
(C) Entire cell
(D) None of the above
Q. One term that generates the maximum number of ATP atoms in our system?
(A) Decomposition of glucose
(B) Kreb’s cycle
(C) Last respiratory series
(D) Water decomposition
Q. Which of the following organelle is called ‘Power House’ of the cell?
(C) Cell membrane
Q. Corpus luteum is a mass of cells found in
Q. Plasma membrane is built up of
(D) Both (A) and (B)
Q. Which of the following cell organelles play the most significant role in protein synthesis?
(A) Lysosome and Centrosome
(B) Endoplasmic reticulum and Ribosome
(C) Golgi apparatus and Mitochondria
(D) Lysosome and Mitochondria
Q. Lymphocytes cells are formed in which part of human body?
(B) Long bone
Q. The cellular and molecular control of programmed cells death are known as
Q. Which one of the following statements is not true with regard to the transplantation of stem cells in animals?
(A) They multiply themselves throughout the life span of an animal
(B) They repair the damaged tissues of the organs
(C) They have the capacity to produce one or more types of specialized cells
(D) They are found only in the embryo
7. Human Anatomy
Q. With reference to the latest developments in stem cell research, consider the following statement.
1. The only source of human stem cells are the embryos at the blastocyst stage.
2. The stem cells can be derived without causing destruction to blastocysts.
3. The stem cells can regenerate themselves in vitro virtually forever.
4. Indian research centres also created a few cell lines which can be developed into many types of tissues. Which of these statements are correct?
(A) 1, 2, 3 and 4
(B) 1, 2 and 3
(C) 1, 3 and 4
(D) 3 and 4
Q. The most abundant element found in the human body is