(1). About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

• (a). sulphur and magnesium
• (b). magnesium and sodium
• (c). calcium and phosphorus
• (d). phosphorus and sulphur
• (e). None of these

(2). Modern detergents contain enzyme preparations of

• (a). thermoacidophiles
• (b). thermophiles
• (c). acidophiles
• (d). alkaliphiles
• (e). None of these

(3). A competitive inhibitor of succinic dehydrogenase is

• (a). ?- ketoglutarate
• (b). malate
• (c). malonate
• (d). oxaloacetate
• (e). C and D

(4). Cellulose is the major component of cell wall of

• (a). pseudomonas
• (b). saccharomyces
• (c). pythium
• (d). xanthomonas
• (e). None of these

(5). Carbohydrates are commonly found as starch in plants storage organs. which of the following five properties of starch(1-5) makes it useful as a storage material? I) easily translocated II) chemically non-reactive III) easily digested by animals IV) osmotically inactive V) synthesized during photosynthesis

• (a). I,III and V
• (b). I and V
• (c). II and III
• (d). II and IV
• (e). None of these

(6). Three of the following statements about enzymes are correct and one is wrong. which one is wrong?

• (a). enzymes require optimum pH for maximal activity
• (b). enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperature 800C-900C
• (c). enzymes are highly specific
• (d). most enzymes are proteins but some are lipids
• (e). None of these

(7). Which one is the most abundant protein in the animal world?

• (a). trypsin
• (b). haemoglobin
• (c). collagen
• (d). insulin
• (e). None of these

(8). Synapsis occurs between

• (a). mRNA and ribosomes
• (b). spindle fibres and centromere
• (c). two bomologous chromosomes
• (d). a male and a female gamete
• (e). None of these

(9). During mitosis, ER and nucleolus begin to disappear at

• (a). late prophase
• (b). early metaphase
• (c). late metaphase
• (d). early prophase
• (e). None of these

(10). Select the correct option with respect to mitosis

• (a). chromatids separate but remain in the centre of the cell in anaphase
• (b). chromatids start moving towards opposite poles in telophase
• (c). golgi complex and endoplasmic reticulum are still visible at the end of prophase
• (d). chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
• (e). None of these

(11). At metaphase, chromosomes are attached to the spindle fibres by their

• (a). satellites
• (b). secondary constrictions
• (c). kinetochores
• (d). centromeres
• (e). None of these

(12). During gamete formation, the enzyme recombinase participates during

• (a). metaphase-I
• (b). anaphase-II
• (c). prophase-I
• (d). prophase-II
• (e). None of these

(13). Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

• (a). metaphase-I
• (b). metaphase-II
• (c). anaphase-I
• (d). anaphase-II
• (e). None of these

(14). The complex formed by a pair of synapsed homologous chromosomes is called

• (a). bivalent
• (b). axoneme
• (c). equatorial plate
• (d). kinetochore
• (e). None of these

• (a). (v) (iv) (viii) (iii)
• (b). (i) (iv) (viii) (vi)
• (c). (vi) (v) (iv) (vii)
• (d). (v) (i) (iii) (ii)
• (e). None of these

• (a). Potential energy Transition state Activation energy with enzyme Activation energy with enzyme
• (b). Transition state Potential energy enzyme Activation energy without enzyme Activation energy with enzyme
• (c). Potential energy Transition state enzyme Activation energy with enzymeActivation energy without
• (d). Activation energy with enzyme Transition state Activation energy without enzyme Potential energy
• (e). None of these

• (a). enzymatic activity pH
• (b). temperature enzyme activity
• (c). substrate concentration enzymatic activity
• (d). enzymatic activity temperature
• (e). None of these

• (a). C-karyokinesis
• (b). D-synthetic phase
• (c). A- cytok inesis
• (d). B-metaphase
• (e). None of these

• (a). metaphase - telophase
• (b). telophase - metaphase
• (c). late anaphase - prophase
• (d). prophase - anaphase
• (e). None of these

• (a). prophase-I during meiosis
• (b). prophase-II during meiosis
• (c). prophase of mitosis
• (d). both prophase and metaphase of mitosis
• (e). None of these