R4RIN – MCQs, Mock Tests | NTS NTS BIOLOGY CURRENT AFFAIRS SET 2

Highly intelligent mammals are

1. rat
2. bat
3. dolphin
4. elephant

✅ Correct Answer: 3

Plants absorb most part of water needed by them through their

1. stem
2. root hairs
3. leaf
4. bark

✅ Correct Answer: 2

One of the following is not a function of bones

1. support
2. production of blood cells
3. protein synthesis
4. muscle attachment

✅ Correct Answer: 3

Movement of cell against concentration gradient is called

1. active transport
2. osmosis
3. diffusion
4. both b and c

✅ Correct Answer: 1

Pollination is best defined as

1. germination of pollen grains
2. transfer of pollen from anther to stigma
3. formation of pollen grains
4. none of these

✅ Correct Answer: 2

DNA structure was first described by

1. Pasteur
2. Robert Koch
3. Watson and Crick
4. Carlous Linnaues

✅ Correct Answer: 3

The most abundant element in the Earths atmosphere is

1. Oxygen
2. Nitrogen
3. Hydrogen
4. Carbondioxide

✅ Correct Answer: 2

Haemodialysis means cleaning of

1. urine
2. blood
3. glomerular filterate
4. coelomic fluid

✅ Correct Answer: 2

Production of sweat and sebum is related with

1. skin
2. liver
3. lungs
4. GIT

✅ Correct Answer: 1

The evaporative cooling in the respiratory tract of dogs is called

1. vasodilation
2. vasoconstriction
3. panting
4. all of these

✅ Correct Answer: 3

Which of the following pathogen type cause disease that can be treated with antibiotics?

1. bacteria
2. fungi
3. virus
4. none of these

✅ Correct Answer: 1

Most cell membranes are composed principally of

1. DNA ad protein
2. protein and lipids
3. protein and chitin
4. protein and RNA

✅ Correct Answer: 2

Normally, in the process of osmosis, the net flow of water molecules into or out of the cell depends upon differences in the

1. concentration of water molecules inside and outside the cell
2. concentration of enzymes on either side of the cell membrane
3. rate of molecular motion on either side of the cell membrane
4. none of these

✅ Correct Answer: 1

Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

1. diffusion
2. passive transport
3. osmosis
4. active transport

✅ Correct Answer: 4

Proteins are made from amino acids by the process of

1. hydrolysis
2. pinocytosis
3. dehydration synthesis
4. active transport

✅ Correct Answer: 3

Which is an organic compound found in most cells?

1. water
2. glucose
3. oxygen
4. sodium chloride

✅ Correct Answer: 2

Which are the four most abundant elements in living cells?

1. carbon, oxygen, nitrogen, sulfur
2. carbon, oxygen, hydrogen, nitrogen
3. carbon, oxygen, sulfur, phosphorus
4. carbon, sulfur, hydrogen, magnesium

✅ Correct Answer: 2

Whic from the following is the correct classification?

1. Kingdom ? Order ? Class ? Family
2. Kingdom ? Phylum ? Class ? Order
3. Kingdom ? Class ? Species ? Family
4. Kingdom ? Class ? Phylum ? Family

✅ Correct Answer: 2

Which from the following is NOT the function of Enzymes?

1. speed up chemical reaction
2. digest food substances
3. involved in cellular respiration
4. maintain healthy epithelial tissues

✅ Correct Answer: 4

The small intestine consists of

1. duodenum, jejunum and ileum
2. duodenum, caecum and ileum
3. duodenum, jejunum and rectum
4. caecum, colon and rectum

✅ Correct Answer: 1

Red Blood Cells are produced by the

1. kidneys
2. Lungs
3. Bone Marrow
4. Lymph

✅ Correct Answer: 3

The lifespan of platelets is _________ days.

1. 5
2. 6
3. 100
4. 120

✅ Correct Answer: 2

The salt and water balance of the body fluid is maintain by the

1. Kidneys
2. Urinary bladder
3. Lymph
4. Chloroplasts

✅ Correct Answer: 1

The pH concentrations at which maltase is least effective are

1. 1 and 7
2. 1 and 14
3. 7.5 and 14
4. 10 and 14

✅ Correct Answer: 2

Most cells lacking a cell wall also lack

1. mitochandria
2. chloroplasts
3. a vacuole
4. a Golgi complex

✅ Correct Answer: 3

The Hardy-Weinberg principle applies to

1. locomotion
2. population genetics
3. blood transportation
4. the cell theory

✅ Correct Answer: 2

Genetic information is transmitted from DNA to

1. the sites of protein synthesis
2. proteins
3. amino acids
4. digestive enzymes

✅ Correct Answer: 1

The part of brain which is responsible for long term memory and learning is

1. hippocampus
2. medulla
3. amygdala
4. hypothalamus

✅ Correct Answer: 1

The number of thoracic vertebrae

1. 7
2. 12
3. 9
4. 5

✅ Correct Answer: 2

The anti-diuretic hormone acts on which part of nephron to cause re-absorption of water?

1. proximal convoluted tubule
2. loop of henle
3. collecting duct
4. distal convoluted tubule

✅ Correct Answer: 3

When a single gene has multiple phenotypic effects the phenomena is called

1. pleiotropy
2. codominance
3. over dominance
4. epistasis

✅ Correct Answer: 1

The duration of G-2 phase is

1. 10 hrs
2. 30 min
3. 9 hrs
4. 4.5 hrs

✅ Correct Answer: 4

The initiation codon is

1. AGU
2. UAA
3. UAG
4. AUG

✅ Correct Answer: 4

Bony fishes have brain with how many pair of cranial nerves?

1. 10
2. 11
3. 14
4. 12

✅ Correct Answer: 1

The most common rust fungi species are

1. ustilago
2. puccinia
3. aspergillus
4. penicillium

✅ Correct Answer: 2

Kelps belong to which phylum?

1. rhodophyta
2. chlorophyta
3. phaeophyta
4. pyrrophyta

✅ Correct Answer: 3

Super blue green algae or expensive pond scum contain __________ protein.

1. 55%
2. 75%
3. 45%
4. 60%

✅ Correct Answer: 4

Cohesion tension theory is given by

1. Morgan
2. Dixon
3. Robert
4. Sacks

✅ Correct Answer: 2

Air sacs in most of the birds are

1. 6
2. 11
3. 9
4. 12

✅ Correct Answer: 3

Air spaces in leaf comprises total volume of

1. 40%
2. 45%
3. 50%
4. 55%

✅ Correct Answer: 1

In class crustacea of phylum arthropoda sexes are

1. separate
2. hermaphrodite
3. separate and hermaphrodite both
4. none of them

✅ Correct Answer: 1

First complete seed appears in

1. cenozoic era
2. jurassic era
3. devonian era
4. carboniferous era

✅ Correct Answer: 3

Major cause of chlorosis in plants is shortage of

1. magnesium
2. sulphur
3. nitrogen
4. iron

✅ Correct Answer: 4

All are the deformities of skeleton caused by nutritional deficiencies except

1. osteomalacia
2. rickets
3. microcephaly
4. none of them

✅ Correct Answer: 3

Colour blindness is

1. x-linked recessive trait
2. y-linked recessive
3. y-linked dominant
4. x-linked dominant

✅ Correct Answer: 1

Which of the following is not sex-linked recessive

1. colour blindness
2. haemophilia
3. tfm syndrome
4. hypophosphatemic ricket

✅ Correct Answer: 3

Female reproductive cycle is completed in

1. 27 days
2. 28 days
3. 26 days
4. 29 days

✅ Correct Answer: 2

All are paired facial bones except

1. maxilla
2. nasal
3. lacrimal
4. mandible

✅ Correct Answer: 4

Which of the following is not an endotherm

1. bird
2. mammals
3. amphibian
4. insects

✅ Correct Answer: 3

In bud condition the upper surface of leaf shows more growth than lower surface in

1. epinasty
2. hyponasty
3. nutation
4. circumnutation

✅ Correct Answer: 1