The condition in which the blood pH falls below 7.35 is known as:
A. Acidosis
B. Alkalosis
C. Homeostasis
D. Apoptosis
Answer: Option A
Solution (By JKSSB Mock Tests)
Acidosis is a condition of decreased blood pH (7.45). Homeostasis is maintenance of stable internal environment. Apoptosis is programmed cell death. Acidosis can be respiratory (due to CO₂ retention) or metabolic (due to accumulation of acids like lactic acid or ketone bodies).
Consider statements about plant biology: 1. Xylem transports water upwards. 2. Phloem transports food bidirectionally. 3. Cambium is responsible for secondary growth. Which are correct?
Explanation:
Xylem is the vascular tissue responsible for the unidirectional upward transport of water and dissolved minerals from the roots to the aerial parts of the plant. Phloem is the vascular tissue responsible for the translocation of organic nutrients (primarily sucrose) from sources to sinks, which can be bidirectional (up or down depending on the plant's needs). Cambium (vascular and cork) is a lateral meristem responsible for secondary growth, which is the increase in the girth or thickness of stems and roots. All statements are correct.
Explanation:
PCR is an in vitro technique to exponentially amplify a specific DNA segment using primers, Taq polymerase, and thermal cycles. Electrophoresis separates DNA, sequencing determines base order, restriction enzymes cut DNA.
Explanation:
A human zygote is diploid (2n = 46), formed by the fusion of a haploid sperm (23) and a haploid ovum (23). It contains 22 pairs of autosomes and one pair of sex chromosomes (XX or XY). Mitotic division then produces all somatic cells. Gametes are haploid (23).
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