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UPSC Civil services Entrance exams General Studies test # General Science Botany-Reproduction in Organisms Prepare / Learn

Q1. In grafting, scion forms

A. Root system

B. New plant

C. Hybrid plant

D. Shoot system

Answer : Option D
Explaination / Solution:

In grafting, scion forms the upper shoot system and stock forms the lower root system. Grafting is an artificial mode of vegetative propagation in which two plants are cut and same height and joined together.

UPSC Civil services Entrance exams General Studies test # General Science Ecosystem Prepare / Learn

Q2. An ecological succession on bare land proceeds towards

A. Decreasing wetness

B. Increasing wetness

C. Increasing fossils

D. Increasing dryness

Answer : Option B
Explaination / Solution:

An ecological succession on bare land proceeds towards increasing wetness. Availability of water help in faster growth of organism including plants.

UPSC Civil services Entrance exams General Studies test # General Science Measures of Central Tendency Prepare / Learn

Q4. If the distribution is asymmetric, which measure of location is most appropriate if the data is in a nominal scale? If it is in an ordinal scale? If it is in an interval or ratio scale?

A. Median, mean, mode

B. Mode, median, mean

C. Mode, mode, median

D. Median, median, median

Answer : Option B
Explaination / Solution:

A situation in which the values of variables occur at irregular frequencies and the mean, median and mode occur at different points. An asymmetric distribution is said to exhibit skewness. In contrast, a symmetric or normal distribution, when depicted on a graph, is shaped like a bell curve and the two sides of the graph are symmetrical.

UPSC Civil services Entrance exams General Studies test # General Science Employment Growth Informational and other Issues Prepare / Learn

Q5. Which of the following is false regarding Disguised unemployment

A. More people are engaged than required

B. Mounting pressure of population in rural areas with no alternative employment

C. Marginal productivity of worker is high

D. Feature of agrarian economy

Answer : Option C
Explaination / Solution:

Disguised unemployment is defined as a situation when marginal productivity of labour is zero or negative.

UPSC Civil services Entrance exams General Studies test # General Science Laws of Motion Prepare / Learn

Q6.

A man of mass 70 kg stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m $s^{- 2}$ what would be the reading on the scale?

A. 150 kg

B. 130 kg

C. 120 kg

D. 105 kg

Answer : Option D
Explaination / Solution:

When the lift moves upward with acceleration = 5 ms-2 the net force acting upward

$\begin{aligned} R - m g = m a \\ R = m g + m a \\ R = m (g + a) \\ R = 70 (10 + 5) \\ R = 1050 N \end{aligned}$

R = 1050 N

(We experience weight due to reaction)

therefore Apparent weight = $= \frac{1050}{g} = \frac{1050}{10} = 105 k g$

UPSC Civil services Entrance exams General Studies test # General Science Locomotion and Movement Prepare / Learn

Q7.

Read the following about joint replacement therapy :

i. Artificial joints are made from the similar material that makes our bones.
ii. Metal or plastic is used to prepare an artificial joint.
iii. Following figure shows a disfunctional joint in the knee.
iv. Above figure shows an artificial joint in the knee.

A. only statement i) and iii) are correct.

B. only statement iv) is correct.

C. only statement i) and iv) are correct.

D. only statement ii) and iv) are correct.

Answer : Option D
Explaination / Solution:

Artificial joints are made up of metal and plastic. The figure shown above shows artificial joint in the knee.

UPSC Civil services Entrance exams General Studies test # General Science Biotechnology and its Applications Prepare / Learn

Q8. Bio-weapons are conventionally used by terrorists as they are

A. Can cause causality

B. Invisible and extremely difficult to detect

C. Easily available

D. Are expensive

Answer : Option B
Explaination / Solution:

Bio-weapons are conventionally used by terrorists as they are invisible and extremely difficult to detect. It includes addition of microbes in water, food etc. that can cause disease in large number of people.

UPSC Civil services Entrance exams General Studies test # General Science Redox Reactions Prepare / Learn

Q9.

E0 values of some redox couples are given below. On the basis of these values choose the correct option.

E0 values: Br2/Br- = +1.90; Ag+/Ag = +0.80; Cu2+/Cu = +0.34; I2/I-(s) = +0.54

A. Cu will reduce

l^{-}

B. Cu will reduce Ag

C. Cu will reduce Br2

D. Cu will reduce

B r^{-}

Answer : Option C
Explaination / Solution:

Because in electrochemical series Cu is above all in sequence I2, Ag and Br2, therefore, Cu will reduce Br2.

UPSC Civil services Entrance exams General Studies test # General Science Reproductive Health Prepare / Learn

Q10. Contraceptive pills are taken for _______ days starting from 5th day menstruation

A. 28

B. 14

C. 21

D. 7

Answer : Option C
Explaination / Solution:

Contraceptive pills are taken for 21days starting from 5th day of menstruation. They increase the female hormone levels to obstruct in ovulation process.