GATE Life Science Mock Test- 5 (Botany & Zoology) - GATE Life Sciences MCQ

A whisky bottle holds 3/4^th whisky, with the remainder being water. What volume of the mixture should be removed and replaced with an equal amount of water in order to achieve a composition of half whisky and half water?

A tank can be filled by two pipes, P and Q, in 6 hours and 9 hours, respectively, while another pipe, R, can empty the tank in 12 hours. Initially, pipes P and R are opened together for 4 hours. After this, pipe P is turned off, and pipe Q is turned on. Following 6 additional hours, pipe R is turned off. What is the total time taken to completely fill the tank (in hours)?

Which coordination complex exhibits a distorted octahedral geometry?
(Given: Atomic numbers of V: 23, Mn: 25, Ni: 28, Cu: 29)

Given the standard electrode potentials:
Fe² 2e– → Fe E° = -0.440V
Fe³ 3e– → Fe E° = -0.036V
What is the standard electrode potential (E^o) for the reaction Fe³ e^– → Fe² ?

Which of the following statements regarding the diborane molecule is incorrect?

Compound X yields alcohol P as the predominant product in the reaction depicted below. Which of the following option(s) could represent X?

How many radial node(s) exist for the valence orbital of the U(III) ion? Provide your answer as an integer.
(Note: The atomic number of U is 92)

Eº = 1.10 V for the following cell reaction:

For this reaction, the equilibrium constant is y × 10³⁷ at 298 K. The value of y is _____ (rounded off to two decimal places). 
(Given: F = 96485 C mol^ˉ1, R = 8.314 J K ^ˉ1 mol^ˉ1)

In a Tobacco callus, which of the following will promote the differentiation of shoots?

The diagram illustrates an unexpanded plant cell located within a hypocotyl, highlighting the arrangement of cellulose microfibrils on its cell wall. Which of the following shapes is most likely to be formed as a result of the cell's expansion, assuming the arrangement of the cellulose fibrils remains unchanged?

In a species where 2n = 16 chromosomes, what is the total number of chromosomes in a cell of a double monosomic individual?

In a diploid organism where 2n = 8, the ovule experiences double fertilization. If the pollen is sourced from an individual exhibiting meiotic nondisjunction, what will be the chromosome count of the zygote?

Establish the correct pairs between Group I and Group II concerning the substances that disrupt oxidative phosphorylation.

Cimeric genes incorporating the CAMV353 promoter and coding for human serum albumin (HSA) were successfully transferred to yield

Which category is known as the "Gem of the plant kingdom"?

Pair the items from the list below:

Retroviruses encode reverse transcriptases. The sole enzyme found in mammalian cells that exhibits reverse transcriptase-like activity is

Which ONE of the following types of leucocytes possesses phagocytic properties and features a clear cytoplasm?

Which option represents a flawless correspondence?

The total count of complementary determining regions (CDRs) present in the functional configuration of an IgM antibody is _____

The polymerase chain reaction is considered a groundbreaking technology due to all of the following reasons, except

Pair the items listed below:

Both tarantulas and mosquitoes are classified under the phylum Arthropoda. Which ONE of the following accurately indicates the number of legs found in each of them, respectively?

Pair the subcellular organelles listed in Column I with their corresponding functions found in Column II.

Signal transduction occurs when an extracellular signaling molecule activates a receptor on the cell surface, thereby modifying intracellular molecules and eliciting a response. This process comprises two stages:
i. A signaling molecule activates a specific receptor protein located on the cell membrane.
ii. The 2^nd messenger transmits the signal into the cells, leading to a physiological response.

The mechanism of signal transduction by steroid hormones differs from that of amine and peptide hormones because

Which of the following methods is/are employed to ascertain the three-dimensional configuration of proteins?

An enzyme exhibiting Michaelis-Menten kinetics facilitates the transformation of 35 μM of substrate into product at a reaction velocity of 10 μM s^-1. The K_m and k_cat values for the substrate are 14 μM and 500 s^-1, respectively. The total concentration of enzyme used in the reaction is _____nM.