5079 + Mcqs in Experienced McqOptions

1.	Which of these is not required for electrophilic catalysis?
A.	Mg2+
B.	Zn2+
C.	Mn2+
D.	Ser 195
Answer» B. Zn2+

Discussion

2.	_____________ involves donation of electrons from nucleophilic active site residues to a substrate forming a covalent adduct transition state intermediate.
A.	General acid-base catalysis
B.	Specific acid-base catalysis
C.	Electrophilic catalysis
D.	Nucleophilic catalysis
Answer» E.

Discussion

3.	A type of catalysis which involves covalent intermediate transition state formation between the cationic electrophilic group in the enzyme and the electron rich portion of the substrate is referred to as ____________
A.	general acid-base catalysis
B.	electrophilic catalysis
C.	nucleophilic catalysis
D.	specific acid-base catalysis
Answer» C. nucleophilic catalysis

Discussion

4.	Chymotrypsin: Nucleophilic catalysis:: Carboxypeptidase A: __________
A.	General acid-base catalysis
B.	Specific acid-base catalysis
C.	Electrophilic catalysis
D.	Nucleophilic catalysis
Answer» D. Nucleophilic catalysis

Discussion

5.	The phenomenon which involves formation of an additional covalent intermediate in a reaction that helps to reduce the energy of later transition states is referred to as ___________
A.	covalent catalysis
B.	substrate collision theory
C.	general acid-base catalysis
D.	specific acid-base catalysis
Answer» E.

Discussion

6.	In the catalysis of RNA by Bovine pancreatic RNase A, His 12 acts as proton donor.
A.	True
B.	False
Answer» C.

Discussion

7.	The type of catalysis wherein the proton donation or acceptance is done by water molecule is referred to as _____________
A.	substrate collision theory
B.	lock and key model
C.	general acid-base catalysis
D.	specific acid-base catalysis
Answer» E.

Discussion

8.	Which of the following factor has a negative impact on substrate collision theory?
A.	Temperature
B.	Protonation or Deprotonation
C.	Substrate concentration
D.	Type of medium
Answer» C. Substrate concentration

Discussion

9.	The transition state cannot be achieved by using one of the following methods?
A.	Substrate collision theory
B.	Lock and key model
C.	Acid-base catalysis
D.	Covalent catalysis
Answer» C. Acid-base catalysis

Discussion

10.	The energy required to attain transition state is referred to as _____________
A.	Gibbs free energy
B.	Activation energy
C.	Standard free energy change
D.	pH
Answer» C. Standard free energy change

Discussion

11.	In lock and key model, the enzyme catalyzed reaction may produce an adverse reaction.
A.	True
B.	False
Answer» B. False

Discussion

12.	Which is the model proposed in the following diagram?
A.	Fluid Mosaic Model
B.	Lock and key model
C.	Induced fit model
D.	Miachelis Menten model
Answer» D. Miachelis Menten model

Discussion

13.	Daniel Koshland proposed a model for enzyme’s reaction mechanism in 1958 which is termed as __________
A.	Induced fit model
B.	Lock and key model
C.	Henri kinetic model
D.	Miachelis Menten kinetic model
Answer» B. Lock and key model

Discussion

14.	Which of this is not true for the active site of an enzyme?
A.	Active site is constituted by 3 to 4 amino-acids in a big protein structure
B.	Active site is mainly constituted by non-polar amino acids for catalysis to take place
C.	Water is generally included in the site
D.	Active site is a cleft formed by different amino-acids from different positions in an enzyme molecule
Answer» D. Active site is a cleft formed by different amino-acids from different positions in an enzyme molecule

Discussion

15.	Which of the following is an inversion of double slider crank chain ?
A.	Coupling rod of a locomotive
B.	Pendulum pump
C.	Elliptical trammels
D.	Oscillating cylinder engine
Answer» D. Oscillating cylinder engine

Discussion

16.	Which of the following is an inversion of single slider crank chain ?
A.	Beam engine
B.	Watt’s indicator mechanism
C.	Elliptical trammels
D.	Whitworth quick return motion mechanism
Answer» E.

Discussion

17.	The Grubler’s criterion for determining the degrees of freedom (n) of a mechanism having plane motion is
A.	n = (l – 1) – j
B.	n = 2 (l – 1) – 2j
C.	n = 3 (l – 1) – 2j
D.	n = 4 (l – 1) – 3j
Answer» D. n = 4 (l – 1) – 3j

Discussion

18.	In a 4 – bar linkage, if the lengths of shortest, longest and the other two links are denoted by s, l, p and q, then it would result in Grashof’s linkage provided that
A.	l + p < s + q
B.	l + s < p + q
C.	l + p = s + q
D.	none of the mentioned
Answer» C. l + p = s + q

Discussion

19.	In a kinematic chain, a quaternary joint is equivalent to
A.	one binary joint
B.	two binary joints
C.	three binary joints
D.	four binary joints
Answer» D. four binary joints

Discussion

20.	The relation between the number of links (l) and the number of binary joints ( j) for a kinematic chain having constrained motion is given by j = 3/2 I -2 If the left hand side of this equation is greater than right hand side, then the chain is
A.	locked chain
B.	completely constrained chain
C.	successfully constrained chain
D.	incompletely constrained chain
Answer» B. completely constrained chain

Discussion

21.	The metal in the feeder head cannot be compensated to the shrinkage as the casting solidifies.
A.	True
B.	False
Answer» C.

Discussion

22.	Which is the most common defect caused by the risers?
A.	Blow holes
B.	Shrinkage
C.	Crush
D.	Mould Shift
Answer» C. Crush

Discussion

23.	A riser permits the escape of the air and mold gases.
A.	True
B.	False
Answer» B. False

Discussion

24.	____________ is responsible for the prevention of erosion and washing away from the sand.a) Risersb) Gatesc) Ventsd) Sprue Hole 6.______________ is also called as the feeder head.
A.	Risersb) Gatesc) Ventsd) Sprue Hole 6.______________ is also called as the feeder head.a) Pouring basin
B.	Gatesc) Ventsd) Sprue Hole 6.______________ is also called as the feeder head.a) Pouring basinb) Chills
C.	Ventsd) Sprue Hole 6.______________ is also called as the feeder head.a) Pouring basinb) Chillsc) Riser
D.	Sprue Hole 6.______________ is also called as the feeder head.a) Pouring basinb) Chillsc) Riserd) GateView Answer
Answer» C. Ventsd) Sprue Hole 6.______________ is also called as the feeder head.a) Pouring basinb) Chillsc) Riser

Discussion

25.	When the gases are trapped in the box, they are not allowed to escape.
A.	True
B.	False
Answer» C.

Discussion

26.	Using change of variables principle in double integral we can reduce cartesian integral to simpler form.
A.	True
B.	False
Answer» B. False

Discussion

27.	The value of ∬R sin⁡(x2 + y2) dx dy where R is the region bounded by circle centered at origin with radius r=2 is _____
A.	πcos 4
B.	π(1-cos 4)
C.	π
D.	π(1-sin 4)
Answer» C. π

Discussion

28.	If double integral in Cartesian coordinate is given by ∬R f(x,y) dx dy then the value of same integral in polar form is _____
A.	∬P f(r cos θ, rsin θ)dr dθ
B.	∬P f(r cos⁡θ, r sin⁡θ)rdr dθ
C.	∬P f(r cos⁡θ, r sin⁡θ) r2 dr dθ
D.	∬P f(r sin⁡θ, r cos⁡θ)dr dθ
Answer» C. ∬P f(r cos⁡θ, r sin⁡θ) r2 dr dθ

Discussion

29.	The value of ∬R (x-y)2 dx dy where R is the parallelogram with vertices (0,0), (1,1),(2,0), (1,-1) when solved using change of variables is given by____
A.	16/3
B.	8/3
C.	4/3
D.	0
Answer» C. 4/3

Discussion

30.	Evaluation of \(\int\int_R f(x,y) \,dx \,dy \) in cartesian coordinate can be done using change of variables principle, among the choices given below which is correct explanation of change of variables principle? (Given let x=g(u,v) & y=h(u,v))
A.	\(\int\int_S f(g(u,v),h(u,v)) \,du \,dv\)
B.	\(\int\int_S f(g(u,v),h(u,v)) \frac{d(x,y)}{d(u,v)} \,du \,dv\)
C.	\(\int\int_S f(g(u,v),h(u,v)) \frac{∂(x,y)}{∂(u,v)} \,du \,dv\)
D.	\(\int\int_S f(g(u,v),h(u,v)) \frac{∂(u,v)}{∂(x,y)} \,du \,dv\)
Answer» D. \(\int\int_S f(g(u,v),h(u,v)) \frac{∂(u,v)}{∂(x,y)} \,du \,dv\)

Discussion

31.	The total shift of a transition curve is ___________
A.	L2/12R
B.	L2/24R
C.	L2/48R
D.	L2/96R
Answer» C. L2/48R

Discussion

32.	In a steep terrain the radius of curve is 100m and the design speed is 80kmph then the length of transition curve will be ___________
A.	44m
B.	54m
C.	64m
D.	74m
Answer» D. 74m

Discussion

33.	The rate of change of acceleration in m/sec3 for a design speed of 85kmph is ___________
A.	0.5
B.	0.6
C.	0.7
D.	0.8
Answer» B. 0.6

Discussion

34.	The minimum value of change of centrifugal acceleration is ___________
A.	0.4m/sec3
B.	0.5m/sec3
C.	0.6m/sec3
D.	0.7m/sec3
Answer» C. 0.6m/sec3

Discussion

35.	The most preferred type of transition curve by IRC for highway is ___________
A.	Spiral
B.	Cubic parabola
C.	Parabola
D.	Lemniscate
Answer» D. Lemniscate

Discussion

36.	The mechanical widening of a curve is 1.5m, the curve is having a radius of 120m and design speed as 80kmph find the total widening on the curve.
A.	2.20m
B.	2.26m
C.	2.25m
D.	2.24m
Answer» C. 2.25m

Discussion

37.	The extra width required on two lane pavement for a radius of curve 100m as recommended by IRC is ___________
A.	0.6m
B.	0.7m
C.	0.8m
D.	0.9m
Answer» E.

Discussion

38.	The total off tracking of a vehicle having wheel base length as 6.1m and radius of curve 120m is?
A.	0.15
B.	0.151
C.	0.153
D.	0.155
Answer» E.

Discussion

39.	The length of wheel base usually considered in India is?
A.	6.1m
B.	5.9m
C.	5.8m
D.	5.5m
Answer» B. 5.9m

Discussion

40.	The mechanical widening of a track is given by ___________
A.	l2/2R
B.	nl2/2R
C.	nl3/2R
D.	nl/2R
Answer» C. nl3/2R

Discussion

41.	Determine the truth value of statement ∃n (4n = 3n) if the domain consists of all integers.
A.	True
B.	False
Answer» B. False

Discussion

42.	Let domain of m includes all students, P (m) be the statement “m spends more than 2 hours in playing polo”. Express ∀m ¬P (m) quantification in English.
A.	A student is there who spends more than 2 hours in playing polo
B.	There is a student who does not spend more than 2 hours in playing polo
C.	All students spends more than 2 hours in playing polo
D.	No student spends more than 2 hours in playing polo
Answer» E.

Discussion

43.	”Everyone wants to learn cosmology.” This argument may be true for which domains?
A.	All students in your cosmology class
B.	All the cosmology learning students in the world
C.	Both of the mentioned
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

44.	The statement, “At least one of your friends is perfect”. Let P (x) be “x is perfect” and let F (x) be “x is your friend” and let the domain be all people.
A.	∀x (F (x) → P (x))
B.	∀x (F (x) ∧ P (x))
C.	∃x (F (x) ∧ P (x))
D.	∃x (F (x) → P (x))
Answer» D. ∃x (F (x) → P (x))

Discussion

45.	The statement,” Every comedian is funny” where C(x) is “x is a comedian” and F (x) is “x is funny” and the domain consists of all people.
A.	∃x(C(x) ∧ F (x))
B.	∀x(C(x) ∧ F (x))
C.	∃x(C(x) → F (x))
D.	∀x(C(x) → F (x))
Answer» E.

Discussion

46.	Let R (x) denote the statement “x > 2.” What is the truth value of the quantification ∃xR(x), having domain as real numbers?
A.	True
B.	False
Answer» B. False

Discussion

47.	Let P(x) denote the statement “x = x + 7.” What is the truth value of the quantification ∃xP(x), where the domain consists of all real numbers?
A.	True
B.	False
Answer» C.

Discussion

48.	Determine the truth value of ∀n(n + 1 > n) if the domain consists of all real numbers.
A.	True
B.	False
Answer» B. False

Discussion

49.	Let Q(x) be the statement “x < 5.” What is the truth value of the quantification ∀xQ(x), having domains as real numbers.
A.	True
B.	False
Answer» C.

Discussion

50.	Let P (x) denote the statement “x >7.” Which of these have truth value true?
A.	P (0)
B.	P (4)
C.	P (6)
D.	P (9)
Answer» E.

Discussion

Explore topic-wise MCQs in Testing Subject.

Which of these is not required for electrophilic catalysis?

_____________ involves donation of electrons from nucleophilic active site residues to a substrate forming a covalent adduct transition state intermediate.

A type of catalysis which involves covalent intermediate transition state formation between the cationic electrophilic group in the enzyme and the electron rich portion of the substrate is referred to as ____________

Chymotrypsin: Nucleophilic catalysis:: Carboxypeptidase A: __________

The phenomenon which involves formation of an additional covalent intermediate in a reaction that helps to reduce the energy of later transition states is referred to as ___________

In the catalysis of RNA by Bovine pancreatic RNase A, His 12 acts as proton donor.

The type of catalysis wherein the proton donation or acceptance is done by water molecule is referred to as _____________

Which of the following factor has a negative impact on substrate collision theory?

The transition state cannot be achieved by using one of the following methods?

The energy required to attain transition state is referred to as _____________

In lock and key model, the enzyme catalyzed reaction may produce an adverse reaction.

Which is the model proposed in the following diagram?

Daniel Koshland proposed a model for enzyme’s reaction mechanism in 1958 which is termed as __________

Which of this is not true for the active site of an enzyme?

Which of the following is an inversion of double slider crank chain ?

Which of the following is an inversion of single slider crank chain ?

The Grubler’s criterion for determining the degrees of freedom (n) of a mechanism having plane motion is

In a 4 – bar linkage, if the lengths of shortest, longest and the other two links are denoted by s, l, p and q, then it would result in Grashof’s linkage provided that

In a kinematic chain, a quaternary joint is equivalent to

The relation between the number of links (l) and the number of binary joints ( j) for a kinematic chain having constrained motion is given by j = 3/2 I -2 If the left hand side of this equation is greater than right hand side, then the chain is

The metal in the feeder head cannot be compensated to the shrinkage as the casting solidifies.

Which is the most common defect caused by the risers?

A riser permits the escape of the air and mold gases.

____________ is responsible for the prevention of erosion and washing away from the sand.a) Risersb) Gatesc) Ventsd) Sprue Hole 6.______________ is also called as the feeder head.

When the gases are trapped in the box, they are not allowed to escape.

Using change of variables principle in double integral we can reduce cartesian integral to simpler form.

The value of ∬R sin⁡(x2 + y2) dx dy where R is the region bounded by circle centered at origin with radius r=2 is _____

If double integral in Cartesian coordinate is given by ∬R f(x,y) dx dy then the value of same integral in polar form is _____

The value of ∬R (x-y)2 dx dy where R is the parallelogram with vertices (0,0), (1,1),(2,0), (1,-1) when solved using change of variables is given by____

Evaluation of \(\int\int_R f(x,y) \,dx \,dy \) in cartesian coordinate can be done using change of variables principle, among the choices given below which is correct explanation of change of variables principle? (Given let x=g(u,v) & y=h(u,v))

The total shift of a transition curve is ___________

In a steep terrain the radius of curve is 100m and the design speed is 80kmph then the length of transition curve will be ___________

The rate of change of acceleration in m/sec3 for a design speed of 85kmph is ___________

The minimum value of change of centrifugal acceleration is ___________

The most preferred type of transition curve by IRC for highway is ___________

The mechanical widening of a curve is 1.5m, the curve is having a radius of 120m and design speed as 80kmph find the total widening on the curve.

The extra width required on two lane pavement for a radius of curve 100m as recommended by IRC is ___________

The total off tracking of a vehicle having wheel base length as 6.1m and radius of curve 120m is?

The length of wheel base usually considered in India is?

The mechanical widening of a track is given by ___________

Determine the truth value of statement ∃n (4n = 3n) if the domain consists of all integers.

Let domain of m includes all students, P (m) be the statement “m spends more than 2 hours in playing polo”. Express ∀m ¬P (m) quantification in English.

”Everyone wants to learn cosmology.” This argument may be true for which domains?

The statement, “At least one of your friends is perfect”. Let P (x) be “x is perfect” and let F (x) be “x is your friend” and let the domain be all people.

The statement,” Every comedian is funny” where C(x) is “x is a comedian” and F (x) is “x is funny” and the domain consists of all people.

Let R (x) denote the statement “x > 2.” What is the truth value of the quantification ∃xR(x), having domain as real numbers?

Let P(x) denote the statement “x = x + 7.” What is the truth value of the quantification ∃xP(x), where the domain consists of all real numbers?

Determine the truth value of ∀n(n + 1 > n) if the domain consists of all real numbers.

Let Q(x) be the statement “x < 5.” What is the truth value of the quantification ∀xQ(x), having domains as real numbers.

Let P (x) denote the statement “x >7.” Which of these have truth value true?

is responsible for the prevention of erosion and washing away from the sand.a) Risersb) Gatesc) Ventsd) Sprue Hole 6.__ is also called as the feeder head.