Q. Which one of the following statements about proteins in mammalian cells is correct?
1) Proteins in mammalian cells are synthesized in cell membrane
2) Proteins in mammalian cells are not synthesized in cell membrane but directly absorbed from food
3) Proteins in mammalian cells are synthesized in rough endoplasmic reticulum
4) Proteins in mammalian cells are synthesized in Golgi apparatus
Q. Which one of the following statements about transport mechanism in plants is correct?
1) Diffusion of ions and small molecules across cell membrane requires energy.
2) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy.
3) Cells conserve energy and no energy is required for transport of ions and small molecules against concentration gradient.
4) Cells do not transport ions across their membrane as these are charged molecules.
Q. Which one of the following statements about blood elements is correct?
1) Red blood cells' number is same as that of white blood cells and platelets
2) The number of white blood cells is more than red blood cells
3) The number of red blood cells is the highest
4) The number of red blood cells is lower than platelets
Q. Which one of the following statements regarding digestion is correct?
1) Fat present in the food is digested by trypsin and chymotrypsin
2) Starch of food is digested by lipases
3) Fat of food is digested by lipases
4) Nucleic acid is digested by amylases
Q. Which one of the following statements is correct?
1) In photosynthesis by green plants, carbon dioxide is used for making carbohydrate
2) During photosynthesis, plants use oxygen for making carbohydrate
3) The carbohydrate generated by plants comes from soil
4) The carbohydrate generated by plants comes from urea
Q. Phytohormones are :
1) regulators synthesised by plants influencing physiological processes
2) substances controlling diseases
3) substances used for photo-synthesis
4) chemicals used for peeling
Q. Which of the following is necessary to maintain the number of individuals of species and to prevent their extinction?
1) Digestion
2) Circulation
3) Respiration
4) Reproduction
Q. Identify an example of a connective tissue in humans.
1) Cell
2) Muscles
3) Bone
4) Fibres
Q. Which of the following serves as a nutritive tissue for the growing embryo?
1) Ovary
2) Zygote
3) Ovule
4) Endosperm
Q. If ........ is involved, even greater diversity will be generated.
1) asexual reproduction
2) vegetative propagation
3) binary fission
4) sexual reproduction
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